90 mm lenses

[Stephen Kobrin <kobrin2@xman.wharton.upenn.edu>]

The discussion of 90mm lenses is interesting, but confusing.  The "weight"
of opinion appears to indicate that the 2.8 Tele-elmarit is a reasonable
lens.  I have an older rigid 4.0 Elmar 90mm which has the advantages of
small size and very reasonable cost although the obvious disadvantage of
rather slow speed.  I have been thinking of "trading up" to a tele-elmarit
as they are compact and affordable.  How do the newer 90mm lenses compare in
terms of image quality to the older f4.0 Elmars?  Is the difference
marginal--would it take a very large enlargement to see it--or would it be
obvious in an 8X10?  I use the 90 a great deal and would appreciate any advice.

Steve