Alex Armani

Medium format 645 (56mmx43mm) 6x6, 6x7 up to 6x9 (56mm x 86mm), less than that cannot be called medium format. Fuji GFX is slightly bigger than 35mm but not Medium format, Please do not confuse people.

Dallmeyer 51mm 1.0

In close view I can see white has ghost image, that's usually coasing when internal elements are not clean, even they look clean, but they are not. I couldn't find info for Kodak "Signet 80" ...

General Scientific 50mm 2,0, no aperture

Rodenstock lenses are beautiful, they have chiper line and expensive ones. I use all Rosenstock lenses with my Arca Swiss RMD3i Digaron HR 32mm F4, Apo Sironar  55mm F4, Apo Digaron  SW 90mm 5.6 ...