This is the fourth post in a series of tests of the Fujifilm 32-64 mm f/4 lens on the Fuji GFX 50S. The test starts here. The data in the previous post can be reworked to show focus shift as the lens is stopped down: At 64 mm, the focus shift is moderately low. Except… [Read More]
Archives for August 2017
Fuji 32-64/4 LoCA
This is the third post in a series of tests of the Fujifilm 32-64 mm f/4 lens on the Fuji GFX 50S. The test starts here. In order to test on-axis longitudinal chromatic aberration (LoCA), I use computer controlled focusing rail and a razor blade target. A quick review of the test protocol: Fuji GFX 50S… [Read More]
Discovering the Fujifilm GFX 50S microlens size
Frequent readers of this blog have watched me try to get a handle on what’s going on with the microlenses in the Fujifilm GFX 50S. Jack Hogan took a crack at it earlier in the summer, but his business required his attention. Brandon Dube volunteered, and it looks like he has pretty much figured it… [Read More]
Organizing the new Hartnell show
Gary Smith, the Director of the Hartnell Art Gallery, asked me to come over and see what he’d done with the sorting and pre-hanging of the Pastures of Plenty reprise exhibition, which I’m calling This Green Growing Land, which is what I now call the whole series. I love this space. As you can see, there’s… [Read More]
Fuji 32-64/4@64mm tilt, field curvature, & astigmatism
This is a continuation of the development of a simple, relatively foolproof, astigmatism, field curvature, and field tilt test for lens screening. The first post is here. It is also the second post in a series of tests of the Fujifilm 32-64 mm f/4 G-mount lens for the GFX 50s. That test starts here. Brandon… [Read More]
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