The M-mount Leica 90 mm f/2 Apo-Summicron is a special lens. Almost as expensive as the Otus 85/1.4, it doesn’t quite measure up to the Zeiss lens in the standard lens quality metrics. But in spite of — probably because of — its optical deficiencies, it does a superb job of rendering some things. In… [Read More]

This is a continuation of a series of tests on the new Fujifilm 30mm f/3.5 G-mount lens. Today I’m comparing it with the Fuji 32-64 mm f/4 zoom. I did this earlier with a Siemens Star target, which is unforgiving; it was designed to be so. What if we just aim the camera at some… [Read More]

There are two pieces to bokeh. The first is what things look like when they are well out of focus (OOF), and the second is how the transition from OOF to in-focus happens. The second is complicated, but the first is very simple. What you see when part of the image is well OOF is… [Read More]

I used the quick-and-dirty focus curvature test (Photoshop > Filter > Stylize > Find Edges, then convert to B&W) on a picture of my driveway and entry pavers with the 30 mm f/3.5 Fuji G-mount lens wide open on a GFX 50S.     This is excellent performance. Compare that with a more typical wide… [Read More]