Archived posting to the Leica Users Group, 1997/05/20

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Subject: M 21mm f4.0
From: Tony Chang <stchang@novice.uwaterloo.ca>
Date: Tue, 20 May 1997 08:20:13 -0400

Hello LUGers,

I have been looking for a M 21mm f3.4 in good condition for a long time.
Recently, I found a 21mm f4.0 in excellent condition.  The store is asking
for 2000usd (2 caps, metal hood, metal finder).  Since I am looking for the
f3.4 version so I didn't buy it.  I have a few questions and would like to
have anyone's opinions.  Thanks.

1.  Is 21mm f3.4 optical performance better than f4.0?
2.  Is 21mm f4.0 more expensive than f3.4 because its SM and BM
convertability?


Tony Chang
stchang@novice.uwaterloo.ca
4A Co-op Chemical Engineering
University of Waterloo
Ontario, CANADA