In order to compare the a7R and the D800E’s sensor-level shutter release blur, I combined some of raw images from the last three posts into two images that show both camera’s performance with the same vertical and horizontal scales. To review, the two setups were: Zeiss 135mm f/2 APO Sonnar ZF.2 on a Nikon D800E,… [Read More]
Search Results for: Sony shutter shake
A plea for leaf shutters
Iliah Borg’s comment to one of yesterday’s posts got me thinking. After saying that a firmware fix for the a7R’s shutter slap didn’t look likely, he made a passing remark: “Maybe this type of camera needs a leaf shutter.” The more I think about it, the better the idea sounds. Leaf shutters are quiet. Leaf… [Read More]
Demystifying the Sony a7R shutter operation
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]
a7R and D800E shutter slap testing with ISO 12233
I’m looking for a way to do shutter slap testing with sub-pixel sensitivity without spending a lot of money on variable intensity LED Fresnel lights. It occurred to me that I might be able to get what I need using neutral density filters to compensate exposures for different shutter speeds. Before I get started with… [Read More]
Sony a7R — taking stock
Upon thinking about it, I find yesterday’s corner color cast results with the M-mount lenses on the a7R pretty depressing. We’ve already seen that lenses long enough to require a lens collar – or even, I suspect, mounting to the tripod via a plate on the adapter — have a problem on the a7R because… [Read More]