I'm not sure on the coverage for the Apo Digitar, this one does not have the XL. The XL version may or may not have more coverage.
lens name: Image circle:
47mm Apo Digitar (pre-XL) N/A
55mm Apo Sironar Digital 125mm
65mm Grandagon N 4.5 170mm
75mm Grandagon N 4.5 195mm
80mm Apo Digitar (n) 80mm
105mm Apo Sironar Digital 125mm
135mm Apo Sironar Digital 150mm
Can you list the image circle or coverage of the different lenses?