The Fuji GFX 100RF arrived from LensRentals looking brand new. The first surprise was how compact it felt compared to the other GFX cameras. For a medium-format camera it is downright svelte, close in heft to a Nikon Z7 with a small 35mm lens. The design calls to mind a modern digital version of the… [Read More]
Archives for August 2025
Fuji GFX 100RF shutter bokeh effects
Leaf shutter cameras have bokeh issues at high shutter speeds. A few months ago, I posted some really ugly examples from the Hasselblad 90mm f/2.5. We saw a bit of that with the GXF 100RF a few days ago when I posted the out of focus point spread function shots at 1/1000 second. Here are… [Read More]
Fuji GFX 100RF distortion
I tested the GF 100RF wide open for distortion, both with and without the Lightroom lens corrections. Without: I added the red line so that you can see the distortion. It’s pretty severe without the software correction. You can also see the vignetting of the lens. With the Lightroom lens corrections enabled, both… [Read More]
ISO setting for raw files
I’ve taken a lot of shots at trying to explain the effect of ISO setting for raw files. Recently, I was asked to simplify my explanation. Here it is. Warning, some subtilties have been elided. I have likened the ISO dial to the little plastic steering wheel you stick to the dashboard so your 4… [Read More]
Nyquist and aliasing, with examples
Harry Nyquist was a Swedish-American engineer and physicist who spent much of his career at Bell Labs. In the 1920s and 30s he worked on telegraphy, feedback stability, and thermal noise, and in the process laid down results that became bedrock for how we think about sampling. His name is attached to a simple rule… [Read More]
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