The Schneider 80mm f/5.6 Apo Digitar M Lens is a normal view macro specialist lens for large format digital backs, which require smaller but extremely resolved and color correct image circles. No matter how good a conventional-distance lens is, it cannot compete with a macro specialist when shooting at high reproduction ratios. Digital backs also benefit from use of larger apertures to avoid image degradation from diffraction, and this 80mm Apo Digitar M is designed to be used wide open at f/5.6 (but you can stop down to f/8 at 1:1, and to f/11 at distances further than 1:2).