quick summary on all 135 lenses that work very well* via adapter on a GFX 50/100 acc. my tests

• meaning 'good' sharpness also outside the 24x36 area and minor vignette

multiply the full frame focal length by 0.79 to get the equivalent focal length for the GFX

Fringer EF-GFX Pro 500 NEW

Sigma 40f1.4 Art 750 USED

Sigma 85f1.4 Art 619 USED

Sigma 135f1.8 Art 1000 USED

Canon EF 100f2.8 L Macro 474 USED

Canon EF 200f2.8 L 350 USED