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This Guy
29-Sep-2013 Jeff Jackowski

This Guy

This guy keeps showing up, always toting around that cannon. He heard there was a man made of iron walking about and figures that would make for good target practice.

Canon EOS 70D
1/13s f/3.5 at 60.0mm iso100 full exif

other sizes: small medium large original
Lensrentals11-Nov-2013 00:32
I have a somewhat artistic, but very geeky entry for the contest. The image is made from a dozen exposures to improve dynamic range and reduce noise, but I'm not so sure that is what the dynamic range category is for. It also has plenty of background bokeh. Not the regular kind, but it has some fascinating aspects, so I suppose that'll be a fair category. Maybe the hors one, too; I'll defer to your judgment.

This picture features a Star Wars Lego figure for easily recognizable geekiness. The figure is primarily lit from below by a flash; everything pictured is on top of a glass desk. The background is a stack of CD-Rs with a flashlight illuminating it from behind.

I took 12 exposures while varying the flash power and duration. I combined them using the exposure blend (expoblend) tool from the Kipi plugins that came along with Digikam. This is all open source software running on Linux; I'm more of a computer geek than any other kind. The tool looks at various aspects of the pixels in the images, like over/under exposure and color saturation, and assigns a weight to each pixel in each image. It then computes a weighted average. It isn't true HDR processing, and it doesn't lend itself to producing absurdist colors the way I use it. It does, however, allow the final image to incorporate a wider dynamic range than any single image and works to reduce noise without harming detail. Look close and I think you'll find that there is very little noise.

The illuminated CD-Rs create some very interesting out-of-focus details. Firstly, there is the more regular rounded highlights. The most notable one is at the bottom left, and there are a few subtle ones right of center in the top half. Then there are the illuminated stacked ones. There are four columns of these. The one on the left is curved along with the CD-Rs; that is the end of the disks. The others show prism like vertical bars that are each the height of the out-of-focus highlights.

Most fascinating, though, are the thin horizontal lines in the bottom center of the picture. The lines are coming from out of focus parts of the image, but are much more defined than the highlights. My best guess so far is that these lines are created by overlapping out of focus lines adding together to make brighter regions. I think this will allow for the lines to be as thin as if that part of the image was in focus, but the lines captured by this image are created by being out of focus. While they come from horizontal lines, each line here is made by many such lines rather than just one out of focus highlight. I guess it could be called emergent detail. I've got another picture with the CD-R background that shows swirling lines that only exist out of focus. It's a fun background.
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