Tagged: Light

22nd, 29th March – Peter Weaver and a Practical Evening

Apologies for missing a post, IT problems. Our guest speaker was the always welcome Peter Weaver, who will be returning in a couple of weeks to judge Round 3 of the Open Competition. This was followed by a video tutorial and a table top session. Peter showed us many instances of his own photographic journey and this set me to thinking about one particular aspect which we have talked around but not directly addressed in a while, that of taking pictures of people.

There are many forms this can take from the happy snap via passport style documentary through street to high art. For all of these we are going to use the same basic formula with appropriate, or lack of appropriate, vigour, starting with the background, putting our subject in it, lighting it then recording it. We are speaking generally.

So, background. Avoiding the classic lamp post/tree branch growing out of the subject’s head takes a bit of practice. Border patrol needs to become a habit when our attention is mainly on the subject, but that is easier said than done, especially when we are starting out. Choosing the background against which we will contrast our subject helps in getting this right. Not fool proof, but it works more often than it doesn’t and that little equation can be affected positively by establishing a routine and sticking to it.

Two easy to stick to rules for backgrounds are fill the frame with your subject (goes for all single subject photographs) and blur the rest. In the first of these we can either zoom with the lens or zoom with our feet. Perspective doesn’t change the same way when we zoom with the lens as when we zoom with our feet, as different focal lengths will handle background compression in a different way (sort of, it’s the subject to distance that changes in order to keep the subject the same size in the lens).

Putting the subject into a pre-selected background minimises the chances of there being unintended distractions in frame. Basically, if it doesn’t add to the story you are trying to convey, get rid, either by moving to another location, cropping tighter or changing the angle between lens and subject.

In the studio we might generally light the scene at this stage and refine with the model in it, which is fine where control is total, but we don’t always have this option. In more public and more chaotic situations, “Running and Gunning”, we might need to see what we are lighting first but this is really a personal preference and down to the workflow we adopt – not all workflows are automatically the most efficient but we are after the most effective and that means thinking critically about them from time to time.

Where ambient light is variable it is preferable to put the model in the scene, then light. Variation is part of every point on this process as each time something changes we have a different image and opportunity. Being prepared for the opportunity is a vital step in capturing it.

 

Posing our model is relative to the formality of the shoot.  The corporate head shot is probably the most convention bound of these as portraits of friends informal. Inflation of ego aside, it always amazes me that the item by which their audience is going to judge them most, the  corporate mug shot on the annual report, on advertising, on the web, commands such little time in the executive’s “busy” day. Herd instinct aside, the corporate headshot is a very conservative market. Everything can be pre-lit because so very little changes.

Admittedly there are poses to generally avoid because body language is very  specific in what it conveys. Posing is also gender specific, at least by convention, so we have the idea of male poses and female poses, which, in actuality, are merely what society expects.

Then the lighting. Lighting is as straight forward or as difficult as you want to make it. Essentially it is the interplay of light and shadow and it is something over which we have varying control over depending on the environment we are shooting in.

A home photo-studio doesn’t have to be expensive to build, and if we start out with flash, as many of us do, then we have a very versatile and portable light source that has many uses, the light from which can be usefully and quite cheaply modified for hard light (grids, snoots, beauty dishes and reflectors) or soft (soft boxes, umbrellas, diffusers and flags). What we get in the studio is control.

Light is by far the biggest factor in any photograph. It’s in the name, as we have discussed before. Its qualities are exactly what we trade in. That balance of light and dark we control has four elements: quality, position, intensity and colour and the modifiers are how we go about it when using artificial lighting or a mix. The portability of modifiers (well the smaller ones, a seven foot octobox may not weigh a lot but the slightest of breezes will turn it into a sail) doesn’t preclude them being used outside (and here).

As, more often than not, we are using a mixture of ambient and boosted light, the options for control are broad. For non-artificial lighting we have the exposure triangle, white balance and filters to affect the look of the light. We have exposure compensation, full manual too.

It is all dependent on the way things are arranged in the frame of course. Composition is no small matter. It is as important as the light, indeed it is at least half of what we do to capture our vision, that thing that grabbed our attention.  It’s about  making a statement, or taking that statement and making it our own, but remember : “It’s one thing to make a picture of what a person looks like, it’s another thing to make a portrait of who they are.”

— Paul Caponigro

15th March 2018 – PixelSticking

Pixelsticking, if there is such a word, was our last little venture and thanks to members Rob Dyer and Myk Garton for providing the pieces of kit aforementioned. The pixel stick is a relatively new device, for those of us unfamiliar, that allows the projection of an image across a frame using a long exposure. It is a form of light painting and requires a certain amount of dark in the frame in order to get a long enough exposure and a high contrast.

October 2013 and the Pixelstick was yet another project on Kickstarter a way for pre-designing a light painted image invented by two photographers, Duncan Frazier and Steve McGuigan, and as we saw, the possibilities are almost endless. Frazier and McGuigan’s invention allows not just for sweeps of coloured LED’s to be recorded, but by breaking down image files into 198 x 1 pixel format and displaying them one line at a time any image can be rendered. Each full colour RGB LED in the 198 high (6 foot) stack represents a line when moved across the field of view of the camera lens (utilising anywhere between 1 and all 198 pixels) and combined make for a time lapsed light painted image.

Not that light painting is new. (Time line by light painting photography). The first light painted image on record was taken in 1889, and had the really snappy title of “Pathological walk from in front” (only in French). As such it was a documentary photograph, recording the movement of joints, created by Étienne-Jules Marey and Georges Demeny. Denemy was a student of Marey, when Marey was teaching physiology at the Collége de France. They attached a set of incandescent bulbs to the joints of a subject in the dark and took a long exposure. Long exposures were pretty standard in 1889. Marey also was the first photo-sniper, being the inventor of the chronophotographic gun, and a very great deal more.

The next name in the development of light painting is not a photographer but an early supporter of the Scientific Management movement, you’d probably know it better as Time and Motion, though that was only part of the larger movement, and certainly those of us who engage in any volume of editing in post are aware of the idea of efficient workflow. As with Marey and Demeny Frank Gilbreth Snr used the light painting to study the actions of workers in their work looking for the least effort to produce the most work volume (read profit). He also invented a concrete mixer, but that is by the by.

Perhaps the first name recognisable name to us as photographers to use light painting to effect is that of Man Ray. Man Ray is regarded as a leading figure in the Avant-garde and Dada movements, and he was an extensive, but not exclusive, user of photography in creating his art. He used light painting techniques in a series he called “Space Writing”.

In the 1930’s and 1940’s there were experiments in light painting by artists like Gjon Mili, famous for attaching lights to the boots of ice skaters and his experiments with flash exposures, but most famously in the light paintings executed with Pablo Picasso and Henri Matisse; Barbara Morgan; Jack Delano; and Andreas Feininger. In the 50’s David Potts started moving the camera rather than the subject and explored the use of colour film in what became known as Kinetic Light Painting a.k.a. Camera Painting. George Mathieu, an Abstract Expressionist, used the more traditional method to portray movement for a Japanese magazine cover but his work was mainly as a painter and portraying movement a key feature of that work.

Light painting, then, was something of an oddity, not at all mainstream even though the technique, comparatively, is pretty straight forward. It lurked upon the fringes of photography until the digital age. It starts to look more familiar to us in the 1970’s. David Lebe’s Light Drawings came from his experimentation with pin hole cameras, which capture movement over long periods of time on an essentially still medium. He has an extensive oeuvre in the style. Eric Staller’s work looks like it could be contemporary, many of us have images that look like a Staller, only his were the originals. That said it is David Chamberlain who is the flag bearer in the modern era, being the only artist to exclusively use the techniques of light painting to present his body of work, at least the only one wrooith an extensive reputation. Susan Hilbrand, Jacques Pugin, fill out the cast and into the 80’s artists like Jozef Sedlák, Viki DaSilva, Mike Mandel, Kamil Varga, John Hesketh and Tokihiro Sato show the popularity of such techniques moving towards, if never actually becoming part of, the mainstream of photographic techniques.

For a historic catalogue of these and others click here and here.

But it is simple to do and you can get a lot of very striking images and it engages the imagination. It is a problem solving exercise, as photography is at heart, and it is fun. It is also getting more popular and though the PixelStick is part of that, it is still expensive and in its infancy. Flickr has its small assembly of PixelStick groups, in the wider Light painting communities there are dozens of groups to choose from. Other social media has its fair share too.

It doesn’t take a lot of extra equipment, most of us will have something around the house we can use to get started. It’s one of the more fun aspects of photography, if you haven’t tried it, why not give it a go?

8th March 2018 – Gerry Painter playing with light and dark

Our thanks to Gerry Painter for a very informative evening, using his photography to show how to play light and dark using a basic home studio. Gerry showed us how to get great results using a sound grasp of how light and flash work, and the basics of posing your subjects for effect.

And it doesn’t have to demand a big budget. There are hacks you can take in order to get the look you want without, necessarily, spending a fortune. You certainly don’t need a full-time studio so you can use flash for portraiture, but a studio does present the peak of the idea of a controlled photographic space. We have touched on this before this season with club member Steve Dyer when we talked about a basic off camera flash set up, and I would suggest that post is worth a re-read from the point of view of building the hardware side. It also links back to two earlier posts, one covering hard and one covering soft light modifiers.

Photographing people is, quite possibly the major part of photography. Certainly, it makes up a large, perhaps the largest, sector of the professional market. What people are paying for is not, necessarily, a straightforward record, but a record of a connection, one that brings out their personality, a fraction of a life, something which speaks of them and of the moment. Even though we live in the age of the selfie there is still a perception that there is something else to be had from the viewpoint of another.

Even so, the motivations behind the selfie, which love it or loathe it are massively the largest by number photographs posted online, 24 billion 2016 according to Google, are not so simple. The motivations for those so bent on broadcasting their lives to the point of dying of it, more people were killed taking selfies than in shark attacks that year, are not just narcissistic.

Within this huge volume, the data for Instagram alone, and what can be derived from it, is far from trivial, there are, apparently, three categories of motivations : Communication – those who want to inititiate conversation; Autobiography – those who are recording key moments in their lives, not necessarily to bait a response, but as a record they can look back on in a handy format; and the smallest of the groups, the Self publicists – those with a personal or professional need to be “out there” and recognised. “It’s a different kind of photography than we’ve ever experienced before” (Steven Holiday, Brigham Young University) important because it is today’s social history for the future. It can also prove expensive, in more ways than one.

Even so, the basic human form hasn’t changed and that means there are more natural and flattering angles than others, and Gerry took us through some of the basics. First off there is not taking pictures square on, something you can sometimes get away with on male subjects, but almost never seem to work with female ones. And there is a big difference to be had through the simple expedient of shifting the by slightly putting one leg slightly forward, shifting your model’s weight and causing an S-curve. Shifting the weight onto the back leg Leaning forward from the waist and raising the chin smoothes lines around the neck and invites the viewer into the picture. For effect this doesn’t have to be exaggerated, indeed it can look slightly comical if it makes the model look overbalanced. This works for male and female models. As does crossing the arms, which with the other moves described, makes the body look more dynamic.

If the model is sitting then the relative height differences are going to become exaggerated and the crops tend to be much tighter. The leaning forward posture still applies otherwise the model looks like they are backing away. Elbows on knees will tilt someone forward and an accompanying tilt of the head makes things much more personable. In all cases, the eyes are the most important point of focus. If there is one other thing that is universal is the general advice that it is better to have the model angle one shoulder towards the camera.

Gerry packed a lot into one evening not least the need for a connection between the model and the photographer, especially with a model who might not be used to having his/her photograph taken. A lot of people don’t like having their photograph taken. A lot of people buy a camera to make sure they are the comfortable side of the lens. Our job is to put them at their ease. This can be easier said than done and the reasons are pretty hard-wired because the thing we as photographers are looking for is the thing we as individuals do not want to give away.

Experience in other fields leads me to believe that the single biggest factor is the attitude of the photographer towards the person being photographed. Put simply, the attitude you give dictates the attitude you get back. If you are wound up and edgy guess what your model is going to pick up on? Give out a “This is going to be a nightmare” and you get a self-fulfilling prophecy. It’s as much to do with what we do before we start shooting as it is during the shoot. It’s about time spent introducing ourselves and what we have in store for our subject. It’s about promoting the shoot as a joint project either side of the lens. It’s about making being the model on a photo-shoot as something enjoyable. You only have to get part of the way to free things up.


 

On a slightly different note, regular club members will know that Myk Garton last year had a successful exhibition called AS I SEE IT at the Totterdown Canteen (141 Wells Rd Totterdown Bristol BS4 2BU). Myk has got the club a return gig which will be called AS WE SEE IT and photographers within the club have opted to show in the exhibition which will be in May June this year. This is a great opportunity to get and see the club in action. Opening times are 8 a.m. till 3 p.m. seven days a week, More on it as we get closer to the date.

4th January 2018 – Thinking small practising for big.

Happy New Year and we celebrated our return with a well attended evening of table top photography – next week we show the results. This is a good entry point to the year, it’s practical so we get to see and do with others and exchange ideas, but also it is something that we can exercise (more or less) total control over. Yes it might not be our “thing”, yes in the hall we are at the mercy of the overhead lighting and others waiting their turn (on occasion) but the opportunity is the thing.

 

The fact is we can, with very little resource, replicate these moments and use them to our advantage. Find an object – betting the house is full of them. It doesn’t matter what particularly, but, to start with, one that isn’t too shiny, so as we avoid bright spots (specularity) where light sources are reflected in the objects surfaces and not too big – it’s called table top for a reason. This can be controlled but we will come back to that presently.

 

For lights we have torches, they don’t have to be big and powerful (actually something of a disadvantage at close quarters). Some wire twists and something that will be stable when we attach the torch(es) to it as a light stand (or co-opt a friend or relative). Some plain paper to use as a diffuser and Christmas having just passed some coloured sweet wrappers for gels. If we want we can construct yourself a makeshift light box out of an old cardboard box and some grease proof paper, though there are even more minimalist options we can take. We can use tin foil and black card for reflectors and flags.   Ladies and gentlemen I give you your complete photographic studio in miniature!

 

So it’s an entertaining way to pass an evening, useful if we are selling small things on line and we can learn quite a bit about product shots in the process. But it also has other, practical, training uses. It doesn’t make a difference how experienced we are there is always a value to practicing, especially if it is on a subject we don’t usually do. Photography, as David Bailey once pointed out, involves dealing with what is there, photographers don’t enjoy the luxury fine artists have in that anything inconvenient in the scene just doesn’t make it onto the canvas.

 

We have to deal with what is in front of us. The studio is the closest we will ever get to that situation, in miniature or otherwise, being places we put things in rather than take things out. Being a photographer is about having an idea of an image and working with tools we have or can find to work towards what we visualised. Yes I know, that doesn’t really apply to street (actually is does but that is for another time) or at least some forms of street photography. Oh, OK, spray and pray, but like I said, that is for another time.

 

Perhaps the greatest part of this is that we can go through the whole process from visualisation to capturing an image effectively and quickly. And then we can go through the variations of the set up in order to experiment and learn.  Starting with a blank canvas, the light tent is exactly that, we can populate, arrange and light our little stories from scratch. It is a great way to practice basic lighting skills, pretty much for free. In fact thinking of the exercise of placing shapes in relation to each other in a way that gets the attention and lighting it is pretty much the basic definition of photography. Everything we do in these little vignettes can be scaled up. They are good fun and good practise.

 

There is more good practice to be had in controlling light angles too. We mentioned specularity above, basically unwanted reflections. The solutions are straight forward enough and apply to other photographic situations too. Basic rule of reflections is that the angle of incidence equals the angle of reflection. What that means for us is that to avoid glare from a shiny object we don’t need the light source and the camera to be facing the same way. Frame with the camera and then move the light around till the glare disappears. Start at 45 degrees to the camera, you should be plumb in what is known as the family of angles.

 

Constant lights are more convenient here but if we use flash and have triggers so we can use them off camera and using test frames and, of course, knowing the rule of reflection, we know where not to place the lighting in relation to the camera, so that is a start. You don’t necessarily have to have triggers though. The  rest of the solution isn’t complicated and if we use a “big” light source, say from a large soft box then the problem goes away. Don’t have a soft box? A light tent is one answer (basically a multidirectional diffuser). No? A piece of white card to use as a reflector, shoot with the camera facing the card, that will effectively diffuse the light.

 

Finally shadows are just as interesting, if not more so on occasion, and balancing out light and shadow is the root of generating mood in a shot. This is done with what are known as flags. They are used a lot in cinematography and videography. They are also used in product photography. Using them in a table top situation means that DIY options are easily available.

 

So, on these cold and dark evenings there is something to try out.

9th March 2017 – Light Painting Round 3

Henri Cartier-Bresson once said that “Sharpness is a bourgeois concept”.  A bourgeois concept is one that makes the holder appear self important and materialistic, shallow, pretending to be deep, unsophisticated and generally lacking in true class. He never once won a club competition round thinking like that. He did co-found the rather classy Magnum photo agency though, which he described as …. A community of thought, a shared human quality, a curiosity about what is going on in the world, a respect for what is going on and a desire to transcribe it visually.”  Well he would say that, I mean, not even a commended? Obviously a case of if you can’t join them beat them.

 

Our last session on the endlessly fascinating light painting and the impromptu follow up at Abbots Pool on Sunday techniques set me to thinking about this.  Not particularly to bourgeois concepts, you understand, but how the technique generally requires stripping the camera electronics to the basics, especially when not combining any ambient light. Full manual set on a tripod and long exposures, at least we can sympathise with a William Fox-Talbot or a Roger Fenton, though we still have it a lot easier. Equipment is smaller and lighter, we can get, with digital at least, instant review and no messing about with chemicals – though that is a different kind of fun in itself.

 

We are still paying attention to the same basics then. Pre-focussing the lens in the general area of the soon to be action is more guess work than we are used to with auto-focus but we still have to maintain a level of sharpness. What we don’t want is our lenses hunting for a spot with sufficient contrast to lock on to. Most of the time it’s not going to find one in the dark. So, manual focus it is on two grounds. Most people at Abbots Pool seemed to be shooting towards the end at F10, yours truly, different as ever at F8 (actually from aquick excif check it was F8 all night), but that might be the difference in using an SLT camera as opposed to a DSLR. We want our images to retain the lines and patterns in what is technically known as an acceptable circle of confusion.  Basically a zone of focus we register as “sharp”.

 

Shutter speed. Bulb is the order of the day with light painting, at least in the conditions we were shooting in at club and at Abbots Pool. If we are shooting  traffic in town in order to capture the light trails then we are probably looking at somewhere between 6 to 10 seconds as a start point (again at F8, maybe F11) but that is just to find a base line. Similarly we would want to keep a constant aperture and most likely exposure time if we were painting a large object with a single light source (and that would be across frames).

 

The usual advice for a sharp picture is to use the reciprocal of the focal length, so a 50mm lens would suggest 1/50th of second minimum, a 210mm lens 1/250th. Theoretically at least. However this rule of thumb (tool) has been around a long time. Certainly on a full frame 35mm camera with no vibration reduction then it’s no bad way to go. However, should we lengthen the time  by 1.5x or 1.6x to account for an APS-C lens? 2x for a Micro Four Thirds? And how much do we need with VR built in and turned on?  Firstly that full frame thing is a bit of a false lead. As magnification increases the degree of movement needed to register as blur decreases. Magnification does not change with sensor size, the field (and depth) of view does (and low light capabilities and quality given the same number of photo-sites – or pixels as they are commonly called – and the relative numbers on the exposure triangle).Think of it as Width not depth, you won’t go far wrong. Practically, by the way, if it’s too big to see in the viewfinder, it aint gonna fit on the sensor. Secondly VR does allow us to lower shutter speed but how much depends upon the individual and the situation.

 

But hey, we are on bulb (shutter stays open as long as the shutter mechanism is activated), so all that doesn’t matter. And if we are on bulb then we are on a tripod or the camera is stabilised by some other means like a bean bag or a wall etc. The bulb by the way comes from the history of photography as it was a rubber bulb shaped object used to fire the trigger. As long as it was depressed (squeezed) the shutter mechanism remained open. Sound familiar? There is some question as to whether the VR should be turned off on tripod, I have never had to and I have VR on both my camera body and my main lens. Other people have and it has made a difference. Test it and find out for your camera. Then move on.

 

Shooting RAW or JPEG is a personal choice, get those things above right then it doesn’t matter. If you want or need to do a lot of playing around with colour channels, contrast etc then RAW is better. Otherwise do not fret. Fretting about RAW or JPEG is probably a bourgeois concept. Arguing about it rather than taking pictures is definitely a bourgeois concept. Move on.

 

Composition still counts. When in doubt about the area that is going to be used to complete the picture go wide and crop in post. You can take things out, you can’t put things in that you haven’t got a record for.  Generally with the sort of light painting we were doing then going wide was not a bad strategy.

 

Post production is certainly a matter of personal taste. It can be fun to play around with effects and balances but, by and large,  we don’t want it to look over processed. Unless we do. That’s why it’s a matter of personal taste.  Printing your results though means that we are going to want as much colour space as we can get to reproduce the tones and subtleties of colour. sRGB is best for monitors, so we need to make allowances for this.

 

It doesn’t have to be complex, it gets better with practice and it is fun. Get out there and try some.

 

 

N E X T  M E E T I N G

Speaker – Welcome to my outdoor office – Stephen Spraggon

 

 

 

 

 

2nd March 2017 – On lighting angles

It’s all about the light. Not sure how many times I have written that here but it is but a small fraction of the times that I have read it everywhere else.  It is also right and not quite all. It does assume that the thing you have taken the time and effort to point your camera at has a semblance of interest to someone else and that the tools of composition have been suitably employed or ignored-to-particular-effect to create something for the light to fall on, isolate, enhance and otherwise make your efforts worthy.

 

Our next session is light painting, which is always very well attended and makes the light more obvious by reducing the size, direction, angle, distance, shape and colour. These are the six things that we need to control in order to be in command of the result of the single most important element in making an image. Please making, because there is a point to be made that the camera takes the image we make. Viewed from there you can see why a little deeper understanding of light might be useful as we have identified it as the most important element.

 

OK so light without shadow is nothing and we could equally be talking about controlling shadow, in fact that is a useful starting point in itself. It is probably this fact that makes the number one accessory to buy when launching out on this path of painting with light to go with your bright and shiny new camera and lens combination is a five-in-one reflector, though there are pros and cons in using it which need to be mastered.

 

So there are a number of general rules that apply that are useful to carry around in your head, or written down in a note book – what do you mean you don’t carry a notebook? How are you going to keep a record of what works and what doesn’t; or things to try at a later date; or quick calculations of the effects of filters on shutter/aperture? – more importantly to use. So let’s use this blog to investigate the position of the light relative to the camera – just to give that notebook a nudge.

 

Think of a clock face with our camera at 6 and our subject in the centre where the hands (yes it’s analogue) meet.  The light positioned anywhere between 10 and 2 o’clock is going to produce a silhouette and a light coming from behind the subject we would normally treat as a secondary light. We always have to add a source of  light, called a fill light because it fills the shadow in,  and that can be either a reflector or a flash or a continuous light source. This fill light usually comes from anywhere between 4 and 8 on our imaginary Rolex. Creatively a light coming from behind can help create a halo that separates our subject from a dark background but we always have to be careful to light the subject sufficiently. Spot metering can help give you an accurate reading (a separate light meter also has its uses and if we intend to do a lot of studio work  or outdoor portraiture, then definitely worth putting on the equipment list, especially if working with flash).

 

When we position the light source(s) directly from the sides, 3 or 9 o’clock, we get a very dramatic effect characterised by extreme contrast. Unless there is a fill light/reflector on the other side of the subject, the camera will record the subject as being lit on one side with a dark shadow on the opposite. This can be good if you want to create a headshot with a hint of secrecy or ambiguity, less so if you want to convey glamour or a full engagement with the subject.

 

When shooting with light between 4 and 8 o’clock, I’ll come back to 6 o’clock – the camera position – in a moment, this means that the light is coming straight over your shoulders . This has a tendency to produce a flat light lacking significant shadow. Images with flat light often feel like they lack depth and never quite seem to be as we remember the scene being or intended. Basically light and shadow often require further manipulation using diffusers, scrims or in-fills.

 

The six o’clock position is where the camera is and light is at its flattest. That’s why so many on camera/inbuilt flash photographs look so unflattering. Either side of the camera, shadows are created, and shape/texture become more obvious. The width of the shadows increases as the direction of the light moves from the camera towards the side, which is why we see so many lighting set ups set between 4 and 5 o’clock or 7 and 8 – basically 45° to the camera. As a start or a go to you can’t really do better, especially if working out what is going to work best or working a number of angles.

 

And talking of angles, there are three basic ones between camera and subject, two of which are frequently ignored: that is low, eye level and high angles. By far the most photographs are taken from the eye level, which is fine but there are opportunities to mix things up a bit and which will alter the balance of light and shadow too. Easy opportunities not always taken.

 

N E X T  M E E T I N G

Bring your cameras and tripods – 3D light painting

15th December 2016 The Last Post (of the year), Bokeh and Hard Light Modifiers.

Club Social with photo-booth and a bokeh table this week, the last of  2016. So we will talk a little bit about Bokeh before completing our examination of light modifiers, in particular the “hard” modifiers (that’s about the quality of the light not the difficulty of use), and wish you all the best till next year.

 

Bokeh is, I have a lingering suspicion, the best of , if not exactly a bad, then at least, an unavoidable, thing. It is points of light rendered by a lens in the area beyond the zone of acceptable focus. It has, by association, a certain dream like quality. Whether that association with bleary eyes is as the result of a blow to the head, strong liquor, watching too many ’60’s films, recently arising from a deep sleep or a biological need for spectacles I leave to the individual imagination and circumstances. That’s not the sort of explanation I am trying to provide. That’s between you, your conscience and the likelihood of your significant other cracking your alibi.

 

The shallower the depth of field the greater the area of view that will be out of focus. Bokeh occurs at the point where single light sources lose their shape and become mini suns or  circular (sort of) shapes of light. The term is Japanese, meaning blurred or something that approximates to that. It is the product of lens design which in itself is limited by the laws of physics.

 

That blurred area, behind the subject in focus, is formed by circular pools of light where the light has spread out rather than been brought to focus. The patterns formed are diffraction patterns whose edges assume the shape of the lens aperture in the diaphragm through which they pass.

 

The shape (and number) of the diaphragm blades will impact in the shape of the blobs in the background. The size and smoothness are regulated by light source, focal length, aperture and the diaphragm and what constitutes “good” bokeh is purely a matter of personal taste.

 

We started last post to talk about light modifiers, specifically “soft” modifiers. So that leaves the  “hard” modifiers. Probably the thing to note first is that hard light is the default with flash/strobes (I am going to use the terms interchangeably). Flash is probably the first port of call for additional and controllable light for most photographers progressing through the hobby.  There are a number of pro’s and cons in using it. On camera and off camera flash provide some of the same problems but generally off camera flash, that which uses a separate flash gun, is by far the more flexible option and the one we will be talking about here.

 

More specifically on camera flash is more likely to deliver red-eye, demonising your subjects, the light is harsh and direct and can only come from the direction of the camera. Built in flash is less powerful than off camera, separate units and you can’t always control the intensity of light you do have manually. That isn’t to say that built in flash doesn’t have its uses, just that those uses are relatively limited compared to the more modifiable off camera varieties.

 

All flash lighting needs modifying most of the time, and there are four basic types of hard modifiers:

  • Reflectors – your common or garden light modifying accessory, bowl shaped, they have a single but important purpose, to cut down light spill – light that spills to the sides of  (a bare) bulb in a strobe (not exclusively) and when using umbrellas or grids. Also below.
  • Grids – Does what it says on the tin. Black tubes formed in a lattice work they are very effective in stopping scattered light rays coming from the (strobe) bulb, creating a thin, relatively soft beam of light, which arguably puts it into the soft category I know, but I think sits better in this list.  The quality of light is determined by the density of the grid (the number of tubes in the grid), while the size of the beam (expressed in degrees) is determined by the thickness of the grid. The grid is regulated by gates acting as barn doors, movable flaps on each side which allow for finer, narrower, beam control.
  • Snoot – is a cone which focuses light to create a very harsh, small beam of light. Can be rigid or flexible, allowing for some control.
  • Beauty dish – A small reflector, (usually gold, silver, or white) is placed in front of the strobe / flash, while a bowl-shaped reflector is placed around the light source. This creates a very even, hard light with an extremely sharp drop-off. Used almost exclusively in portraiture, it is very useful as a key light.

These are not mutually exclusive pieces of equipment. They can be and should be mixed and matched according to the creative need. They don’t all have to be shop bought,  DIY is always an option, but for the bought stuff the guiding principle, generally, is, you get what you pay for, especially when talking about longevity. This in itself can be a function of the frequency and conditions of use, however when starting out, certainly a look round e-bay or other on line shops will throw up some “bargains”. The bargain is what you feel the value of what you have is.

There are three other essential elements, not, I would put forward, necessarily directly under the heading of light modifiers as they don’t work directly on the source. These are: flags, scrims and bounces (reflectors).

  • Flags block light. Bought flags tend to be black material, some are paper, stretched over a frame with a small handle to make it easier to place on a stand accurately. Black paper and tape will get you a similar effect to stop a white or light coloured wall from reflecting or for shading specularity in shiny objects. Their primary use is to control light spill and keep down highlights.
  • Scrims are panels covered in diffusing cloth, placed where light needs softened locally. You have probably seen them on film and TV sets, spreading tent like over the actors, in order to provide a soft and even light.
  • Reflectors, other than the ones that wrap around your light source, a.k.a bounces, or bounce cards, can be anything that will reflect enough light to be useful, but are usually white, silver or gold material stretched out on a frame. You are probably aware of the five sided reflectors that also have a black surface and an opaque white that can be used as a scrim. Mirrors are frequently used, especially small ones on product shots. They are usually a way of lightening shadows created by the key and other lights. The type of material determines the light’s quality and, and intensity is a product of the distance from the subject and the reflectivity of the surface used. The black on a five sided reflector, for instance, is used to reduce the amount of light going into the subject.

 

And that, as they say in the World of Onions, is Shallot for 2016. Happy New Year.

 

N E X T  M E E T I N G

5th Jan 2017 19:30 – Editing Images: Bring your laptops and challenge your editing skills.