I said in my last post that I was going to work on my composition with the Rule of Thirds, or take 100 pictures of something around the house to get more comfortable with my camera. I will get to these things, but I got side tracked quite pleasantly last night by the gphoto library.
There are a number of different things that you can do with gphoto, but image capture was what I was after. My plan is to write a simple program that takes photos of a single subject over a range of discrete aperture settings. I will then repeat this (programmatically) for a discrete range of shutter speeds. This should give me a grid of image results. Most will be rubbish, but the idea is to educate myself about how these variables interact.
That will be 2 dimensions. You can control a lot more than that with gphoto, so the sky's the limit. Nothing to stop me adding things like ISO to the mix along with other more discrete parameters like white balance.
Teasing out a problem with setting the apertures at the moment, but as soon as I get somewhere sensible with this I will post results and the scripts I used. Gphoto works with a large number of different cameras, so the grid making script will be reusable by most people.
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