I believe the 20mm and 38mm macro lenses are designed as reversed wide angle
lenses. So instead of making a very large area small, they make a very small
area large. Probably also corrected for high magnification/close focus use
(as opposed to further distances and infinity).
----
Andrew "frugal" Dacey
frugal@xxxxxxxxxxxxxxx
http://www.tildefrugal.net/
----- Original Message -----
> Can someone explain again why it's better to use a macro 20mm lens than
> just a normal 20mm lens? (other than that there's no such thing, of
course)
> I've got some macro shots taken at about 7x magnification I took by using
a
> 28mm lens on bellows, and they look pretty reasonable -- at least enough
so
> that I can't tell if the lack of image quality is my fault for not
focussing
> right or the lens..
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