Quote Originally Posted by superd View Post
Unlike camera lenses, where choice of focal lengths is substantial for any given negative size, you're quite limited in the darkroom. You can go longer, but hardly shorter on focal lengths for a given negative. I don't know of any enlarging lenses for 4x5 below 135 (although I would not be surprised if there are some with satisfactory coverage), which as stated already is going to give you the largest print size for same elevation.
I think due to the requirement of flat field, very high in sharpness and especially distortion free it would be very difficult to make a wide angle enlarging lens.