Hello, i'm thinking of getting a Bronica SQ-A with a 40mm lens. Anyone had any experience with this setup? I'm particularly interested in the sharpness of this lens and the viewfinder. What is the field of coverage? I'm very sensitive to precise cropping when shooting, i've read somewhere that it's only 94%, is that true, and if yes what other alternatives are there? I'm intending to use it for architecture and portrait mostly.