Tagged: sharp

24th May 2018 – ROC Round 4 and A Little Blur Goes a Long Way

Reflex Open Competition Round 4 last meeting and congratulations to the award winners and I hope everyone took something away from the evening. Our judge was Roger Mallinson, the man to go to if you want to know about making audio visual presentations and a returnee to judge at Reflex and many thanks to him for his time and effort. As usual the winners will appear on the club website in due course.

There is no special way a photograph should look“ – Garry Winogrand.

Even a themed competition will tell you that and whereas there are things that work as a general rule, the tools of composition, and sharpness, as we have quoted before, is a “Bourgeoise concept” (maybe). It does rather make you wonder what club competitions are for.

Well the first two clues are in the name club competition. It is about members of the club, first and foremost. Members having a framework into which they can receive feedback. And it is about competition, that is to say a test of skill and ability against other like minded individuals. They coexist but, depending on our choices and personalities, one side will be more important than the other. Recognition is both a middle point and the backbone that connects the two extremes.

If no two pictures are the same how do we differentiate between two pictures on merit? The tools of composition give us a clue, more particularly how they are used and abused, but there is no one accepted system, though some sort of system is required to be consistent.

No two judges are the same and that is a good thing. All our judges are fellow photographers and have their own development route. OK we have all sat there and thought, on occasion, what are they on and where do I get some? when our carefully crafted images totally fail to convey their message. The fault does not lie with the viewer. It is still a good thing if that failure comes with an explanation. Better yet one that we can apply to the next similar situation.

If we don’t fail, at least occasionally, and have an inkling of why we fail then we will not learn. It all comes back to that word “Because”. There is no way a photograph should look. There are individual tastes and opinions and that will apply to any judge the same as to the rest of us.

Lets come back to that idea of sharpness and its evil twin blur as one example. Generally, when looking at a photograph, one of the first things that strike us is can we see it clearly. It is important because I, for one, can see blurry things just by taking my glasses off. Rather like a number of my fellow club members, I paid rather a lot of money specifically to do the opposite and see things in focus. Focus is a thing and having something sharp within our depth of focus is generally desirable.

If there was a single way of producing an acceptable image all images must either be all in or all out of focus. We would then be free to challenge this convention or rule in the pursuit of artistic interpretation. Hold on. Wait one. That’s exacly what we do on occasion. It is one of the most popular nights we have for practicals on the calendar. It’s called light-painting.

Blur can be creative when it is deliberate and controlled (or we can pass it off as that). We generally differentiate blur from focus as one is produced by movement and one by mechanical physics. Ultra wide and expensive prime lenses producing very limited acceptable focus and blury (often sold as dreamy) backgrounds are all the rage. Bokeh is a thing too and now deemed as a selling point in a lens. Figure to ground is an established art principle of grouping things together visually (visited recently in our tour around Gestalt theory) where the subject is seperated from but relational to the background (and or foreground).

Creative blur is an accepted technique. That is it is deliberate and measured in its application to a suitable subject. The idea of photo-dynamism is over a century old and is linked to a wider art movement known as Italian Futurism, though photography was initially rejected by the Futurists for being static.

It has several variants we might use. First up we have the deliberate de-focusing effect. Bokeh originated from this in Japan and became a form all of its own but was always an incidental to taking photographs with points of light in the background. Defocusing works best in colour, with large blocks of identifiable shapes such as flowers, people, painted walls etc. It also works well when shooting against a bright background. Where to stop defocusing is a personal call, again there is no fixed point, but it’s fun to do.

Next up we have panning. We talked last week about taking panoramas, basically a linked series of photographs of something from a fixed point that usually extends beyond the horizontal field of focus of our lenses regardless of there orientation. This uses the same movement idea but within the same period of exposure. By necessity this involves longer shutter speeds but doesn’t have to be on a tripod,.though a pair of steady hands is useful. Keeping the focus and speed in synch on the subject is one option, but the other is to slowly follow the subject through keeping it identifiable but blurred.

Thirdly we have the deliberate shake of the camera during the exposure, up and down or left to right. This doesn’t have to be violent to give an effect but it is best if slightly exaggerated. A fourth variation is to rotate the camera during the exposure around a fixed point.

A fifth variant is known as zoom blur sometimes known as zoom burst and is pretty much as it says on the tin. Whilst the camera shutter is open we zoom in or zoom out (obviously we need a zoom lens).

So five variations that we can try and combine into a little project and maybe use to generate entries in the next round of ROC.

8th February 2018 – The Rest of the Way Around the Dial

POSTER

We did Programme as a camera setting back last November, when an alarming number of members were convinced that Elephants were a European phenomena (you had to be there), possibly confusing them (the pachiderms) with Mammoths, possibly from remembering seeing them at the zoo. This meeting it was the turn of the rest of the dial and no such confusion reigned thanks to the scholarly efforts of Chris Harvey, Gerry Painter, Steve Hallam, Eddie House and Simon Caplan. Between them they had manipulation of the exposure triangle well and truly nailed.

 

And if we nail the exposure triangle we have the control of light within our grasp. The other thing we need to have control of is what is acceptably sharp in the picture, a function of lens aperture and shutter speed moderated by the selected ISO setting. With these two things nailed in under ten minutes we are a photographer! Our position in the Point and Shoot Pantheon is but a matter of time!

 

Ah but …. these are the mechanical issues of image capture. Often photographers are as interested in the settings a frame was taken at as the content and whereas they are the key mechanical elements in capturing the image we are viewing they are actually a long, long way down the list of priorities in making a good, bad or outstanding one.

 

Unless our job is making, marketing and or selling cameras for a living.

 

The reasons are thus: to plagiarise  that image you have to be in the same place, at the same angle, in the same light, focused in the same manner, with the same connection to the same elements within the frame, and using the same size sensor. Even then all you have done is copy. The only thing worth copying is the look and that can be as much about post processing as image capture these days. The valid reason for copying a look is to learn about photography by applying it to other opportunities. The camera settings represent one choice from a multiplicity of options to arrive at the same amount of light captured.

 

Let’s put it this way: ISO 100, F8, at 1/125th second gathers as much light as ISO 400, F11, at 1/250th of a second, gathers as much light as ISO 1600, F4, at 1/8000th of a second gathers as much light as ISO 200, F32 at 1/15th second. What alters is the depth of field and the relative degree of that in these examples would depend on sensor/film size. This other variable is why we refer to crop factors compared to the old film size “full frame” 35mm standard (so that those of us set in our ways can get a handle on the perspective generated by a given focal length) and perspective is relative, he wrote with entirely deliberate ambiguity.

 

As we have been plugging the last few weeks rather heavily – and in every blog published for the club, regardless of author –  the issue of absolute prime importance is composition. Yes we have to get the mechanicals “right” for the image we have visualised but that will not arrest the attention of our viewer nearly as much as the arrangement of the elements in the frame. The legendary crime/street photographer Weegee, coined the phrase “F8 and be there” when asked what was the secret to success in his photography. Weege used a Speed Graphic 4 x 5 inch camera and a flash bulb for illumination. The point is, know our equipment and how it gets us the results we visualised. To be fare some people ascribe the quote to Robert Kappa but the point remains the same. Being there means we get the chance to get the picture the f stop is only of relevance If you have the camera with you.

 

Now, we can argue what being there actually implies. and the list would probably be quite lengthy. Most photography to do lists seem to end up that way. Some people even write books about it. Reading photography books is a very good idea, but putting the ideas we draw from them to use is even more productive. Knowing what camera settings other people use can be informative, knowing the performance limitations of our own camera gives us the confidence to experiment. In fact, it could be argued, there are two sorts of photographers who are happy about using Auto/Programme settings. Those who are just starting out and those who are confident enough in their use of the camera to know what it is going to do and when and under what conditions we might have to over ride or compensate. And that leaves us to concentrate on visualisation and composition, which is where the art is coming from.

 

Most photographers, however, set their cameras to  aperture priority and leave them there to control the depth of field. Which is fine. So is shutter priority to control blur. So is manual to control everything, though as a permanent setting does rather slow things down – which can be the point. Auto/Programme is fine. Find one that works for you and use the others to play to their strengths.

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