The Sony alpha 7S is capable of 4K video (aka 2160p, aka 2160×3840) at a bit under 30 frames per second, which I will round to 30 fps. I thought I’d use that camera to do some slit scan photography. Actually, that’s why I bought it a year ago, but it’s taken me a while… [Read More]
The view from my studio window
I’ve started making photographs out my studio window. Here’s one in color, to give you an idea of what the view looks like: But most of the time I’ve been using a Sony a7II that’s been converted for infrared capture by LifePixel. I’m using their standard IR filter, which passes wavelengths as short as long… [Read More]
The dimensions of resolution
Back when I was in high school physics class, the teacher taught us to analyze the dimensions involved in any problem we were trying to solve before plugging in the numbers and grinding out the calculations. If the dimensions weren’t right, you’d set up the problem wrong, and no amount of fancy calculus (this was… [Read More]
Focusing the D810
In the last few posts, I’ve been dealing with my problems in achieving precise, repeatable critical focus with the Nikon D810, which doesn’t have focus peaking. In an attempt to add focus peaking, I hooked an Atomos Shogun monitor/recorder to the HDMI output of the D810, and turned focus peaking on. Close, but no cigar…. [Read More]
Real-world sharpness — what to do?
Yesterday I talked about the impediments to getting, in real world situations, all the sharpness that our best cameras and lenses can deliver. Focusing, diffraction, depth of field, internal and external camera vibration are at the top of the list, and the situation will get worse as better lenses and higher-resolution cameras hit the streets…. [Read More]
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