This is the 68th in a series of posts on the Fujifilm GFX-50S. The series starts here.  In these tests, I found that the AF consistency and accuracy with a low-contrast target was good, but not great. I decided to resun the tests with a higher-contrast inkjet-printed target. The specifics:   ISO 100 AF-S Higer… [Read More]

This is the 67th in a series of posts on the Fujifilm GFX-50S. The series starts here.  I reported here on some inaccurate and inconsistent behavior with the Fuji GFX 50S and the 120 mm f/4 macro lens at some apertures. Yesterday, using a different test protocol on the 110 mm f/2 lens, I found… [Read More]

This is the 66th in a series of posts on the Fujifilm GFX-50S. The series starts here.  In this post, I reported on Fuji GFX 50S systematic autofocus errors at certain f-stops (mostly one, actually) using the 23 mm f/4 lens. I have seen similar behavior with the 63 and 120 macro. When I made… [Read More]

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]