I don't know about the 35 Macro. However, in general terms a "normal" lens is optimised for the light waves entering the lens almost parallel and being "bent" sharpely in.
Once you get near lifesize, the situation is quite different with a similar angle on both sides. Once you go larger than 1:1 you should reverse the lens. If not you make the situation worse. Larger than 1:1 with the lens reversed buts the "angles" on the right side again as the object tends to be nearer the lens than the film plane.
Macro lenses do tend to be optimised for close work. ie with the light angled on both sides and it is much less important to reverse a true macro lens. However, optically, this shouldn't make much difference to the ease of focus, it would be more likely to affect such things as CA.
Mechanically, it could be different. Most macro (or at least MF) ones tend to have a long focus throw because the DOF at very close ranges is so small. ( The Voigtlander 125mm has about 1 3/4 full turns from end to end) At longer ranges the DOF is much greater. With a short throw lens the focus does seem to "snap" in and out more than with a macro which could make it easier to judge when the lens is properly focussed.
Kim
Originally posted by hjb981 Is this a consequence of it being a macro lens? In other words: would a similar lens that is not made for macro work have better image quality at larger distances? I am not asking about the focusing now, but rather if there is a difference in image quality if both lenses are focused properly at a far away subject.