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]

In yesterday’s post, I used photographs of an oscilloscope screen to conclude that the Sony a7R/Zeiss 100mm f/2 Makro-Planar ZF/Novoflex F to E mount adapter/Novoflex adapter collar/Arca Swiss Monoball/Gitzo GT3541XLS combination produced 2 or 3 camera pixels peak-to-peak vibration with the camera oriented in portrait position. The day before yesterday, I performed testing of the… [Read More]

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]

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]

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]