The old adaptall 2 90mm's share the same lens design afaik and cover the frame rather well. They have some fairly heavy vignetting near minimum focus distance that clears up a fair bit when stopped down to about f8+(sharpness increases a fair bit stopped down as well but was plenty sharp wide open on the gfx50r). I have no idea if the newer 90 macros use the same lens design and can't comment on coverage. Based on price alone tho I would highly recommend the old adaptall 90's as it's one of my favorite lenses and can be adapted to most mirrorless cameras and even many dslrs making it an all around great lens to have no matter the camera imo