Difference of ISCO Lenses for GH5 In: ANAMORPHIC Posted October 2, 2019 Someone managed to do it ? Nevertheless, I'm looking for a better taking lense. I thought about a Canon FD 50mm f1.4 but I will get vignette with a speed booster. Would you prefer using a normal adapter to a speed booster with vignette (&crop)? Best regards!