the last word

I’ll get right back to it, but something came up today that’s taking time away from testing the a7R. First, some background. I entered the Center for Photographic Art’s 2014 Juried Exhibition a few months ago. I’m not usually one for entering these kinds of contests, but I find it easy to make an exception… [Read More]

I promised some corner smear tests for the 18mm f/3.8 Leica Super-Elmar ASPH, and the 24mm f/3.8 Leica Elmar ASPH. I’ll show you the results here, both with the Sony a7R and the Leica M240, both res’d up to 12000 pixel across using bicubic smoother. I used Preserve Details in the last post, and I… [Read More]

While waiting for the diffuser to arrive for testing the Adobe Flat Field workflow, I decided to take a peek at corner smearing. I took the lens that had given me a lot of trouble with corner color casts, the Zeiss Biogon 35mm f/2, mounted it on the a7R, went outside and made this picture,… [Read More]

In the last post, I promised pictures. Here goes. But before you look, a few words about what you’re seeing. These are all examples of wide f-stop images — f/4 for the f/4 and f/3.8 lenses, and f/2.8 for the others. Wide openings show falloff and corner color shifts at their worst. They’re also photographs… [Read More]