There are several explanations.
One is that the lens has few surfaces
and not prone to flare. So the lens
gives good contrast, even uncoated.
Another is that the front and rear
elements are symmetrical; you can
dismount one or the other and lengthen
the lens's focal length.
Another is the lens has a good deal of
coma and, if shot wide-open, will give
some slight glow to highlights as a
Another is their deserved reputation in
the market as first-rate lenses.
And, as already noted, they cover a
wide circle, making them desired as
wide-angle lenses, and for working in
ultra-large formats -- they are small
and light for what they can shoot.
Last edited by Rolleiflexible; 03-16-2009 at 10:15 AM. Click to view previous post history.