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]

 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 first post in a series of tests of the Fujifilm 32-64 mm f/4 G-mount lens for the GFX 50s. If you go down to… [Read More]

This is the 70th in a series of posts on the Fujifilm GFX-50S. The series starts here.  For the nonce, I’m done with my little sprint of evaluating the Sony 12-24. I’ll return to the work I was doing on the Fuji 110/2 and the 23/4 on the GFX. Today’s post is about bokeh, and… [Read More]

This is the 69th in a series of posts on the Fujifilm GFX-50S. The series starts here.  There has been some discussion of the long-revered Zeiss 135 mm f/2 Apo Sonnar recently, and I was surprised to find that I’d never checked it for longitudinal chromatic aberration (LoCA) and focus shift. I have the ZF.2… [Read More]