I made another series of images like the one in the previous post, but with a different head: I swapped the RRS BH-55 for an Arca Swiss C1 Cube. Everything else was the same: Leica 135mm f/3.4 APO-Telyt on the A7R with a Novoflex adapter, generic RRS plate on the bottom of the camera, and… [Read More]

It’s been clear to anyone testing the Sony alpha 7R that its shutter is a different animal from what DSLR shooters are used to. I’ve been reporting on what that shutter does to pictures of test targets, of oscilloscopes, and of real subject matter. But what do I know about what goes on inside the… [Read More]

Early on in my testing of the Sony a7R, I ventured the opinion that the camera probably wouldn’t exhibit image degradation from shutter slap with lenses of 135mm or shorter focal length with the camera in landscape orientation with the camera mounted directly to a tripod head (no lens collar). Then I found image degradation… [Read More]

Lloyd Chambers has asserted that a 1/5 pixel blur on a 36 megapixel camera turns it into an instrument with the resolving power of a 24 megapixel one. The logic is superficially appealing: the pixel pitch of a full frame 36 megapixel camera is 4.88 micrometers; multiply that by 1.2 and you get 5.86 um,… [Read More]