This is one in a series of posts on the Fujifilm GFX 100S. You should be able to find all the posts about that camera in the Category List on the right sidebar, below the Articles widget. There’s a drop-down menu there that you can use to get to all the posts in this series; just look for “GFX 100S”.
In this post, I showed you curves that have been fitted to sets of slanted edge images taken at different focus distances with the Fujifilm 80 mm f/1.7 GF lens. From those curves you can deduce how sharp the lens is on-axis at various f-stops, and how the longitudinal chromatic aberration (LoCA) affects the position on the focal plane for the raw color planes of the GFX 100S.
There has been some interest in the fine behavior of the focus bracketing feature that I used to make the captures analyzed in the preceding post. Do we see the “stair-step” behavior that we saw with the 110 mm f/2 GF lens? It turns out we do, but to a lesser degree.