I recently spent a bitterly cold morning lying prone on the side of a snowy hill taking images of hoar frost covering the ground. I was on a 'white - on - white' mission for this month's photo assignment. Looking at hoar frost at high magnification gives me the impression that I'm looking at trees and bushes at a much grander scale. So that's the result I was hoping for with my photo. The actual size of the image is about 10mm x 15mm - I had a few inches of extension tubes on my 90mm F2.5 Tamron macro lens and the image is also cropped to improve composition. The camera was on a tripod and I took a series of about 30 images over almost the entire range of focus travel on the lens, which was set to F11, I think. I used Zerene Stacker software to combine the images. The only colour visible was in a few highlight reflections, and I applied a general greyscale conversion in Lightroom. The resulting image is just what I hoped for, but since it's more 'black & white' rather than 'white-on-white', I figured I'd put it in this category.
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