In the preceding post, I tested the Zeiss 100mm f/2 Makro Planar ZF mounted on a Sony a7R with the Novoflex Nikon-lens-to-E-mount adapter with the Novoflex rotating tripod collar attaching both to an Arca-Swiss Monoball head and Gitzo GT3541XLS legs, with the first set extended all the way and the next one half way. I… [Read More]
Archives for 2014
Shutter slap testing with ISO 12233, part 5
I wanted to see what the Sony a7R shutter slap looked like with a longer lens, and what happened when the camera is in portrait orientation. I chose the Zeiss 100mm f/2 Makro Planar ZF and fitted it to the camera with the Novoflex Nikon-lens-to-E-mount adapter. I attached the Novoflex rotating tripod collar to the… [Read More]
Shutter slap simulation with ISO 12233, part 3
Today we’re back to simulated images of the ISO 12233 target. Here are the camera parameters: Perfect lens 64-bit floating point resolution Target resolution: 10000×6667 pixels Target size in camera pixels: 1500×1000 No photon noise No read noise No pixel response non-uniformity 100% fill factor No focus error Bayer pattern color filter array: RGGB No… [Read More]
Shutter slap testing with ISO 12233, part 4
The Sony a7R/55mm Sonnar testing with strobe illumination of the ISO 12233 target performed in the previous post got me worried. If the Sony’s shutter affects the sharpness of strobe-lit subjects with a normal focal length lens, would Nikon D800E mirror slap suffer the same fate? I mounted an AF-S 58mm f/1.4G lens on the… [Read More]
Shutter slap testing with ISO 12233, part 3
One of the unanswered questions from yesterday’s post was, “What degradation does the variable ND filter do to the image?” Today I set out to get a handle on that. I went into a dark room and lit a smaller version of the ISO 12233 target with two Paul Buff White Lightning X1600 (1600 watt-second)… [Read More]