This is the first in a series of tests of the new Voigtlander macro lens. To see all the tests, scroll to the bottom of this pace — below the comments — and click on the ping-back links whose titles interest you. I received my Voigtlander 65 mm f/2 Apo-Lanthar yesterday and tested it off-axis… [Read More]
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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]
Sony 12-24 LoCA & focus shift at 18 & 24 mm
This is part 9 of a test of the Sony 12-24 mm f/4 FE lens. The test starts here. I tested the Sony 12-24 mm f/4 FE lens for on-axis longitudinal chromatic aberration (LoCA) and focus shift. I used my computer controlled focusing rail and a low-contrast inkjet-printed slanted edge target. A quick review of… [Read More]
Focus shift & LoCA of Fuji 110/2 on GFX
This is the 64th in a series of posts on the Fujifilm GFX-50S. The series starts here. Two days ago, I reported on longitudinal chromatic aberration (LoCA) and focus shift with the Fuji 23 mm f/4 lens on the GFX 50S. I found the focus shift to be minimal, and the LoCA about average for… [Read More]
Focus shift, LoCA, focus stability of Fuji 23/4 on GFX
This is the 63rd in a series of posts on the Fujifilm GFX-50S. The series starts here. I measure focus shift and longitudinal chromatic aberration (LoCA) in lenses in the following way. I mount the camera to a Cognisys computer-driven focusing rail. I set the controller up to use 160 mm of travel and make… [Read More]
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