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[Rollei] 2.8A Tessar
- Subject: [Rollei] 2.8A Tessar
- From: Marc James Small <msmall >
- Date: Tue, 20 Jul 1999 12:42:55 -0400
At 08:48 AM 7/20/99 -0700, Todd wrote wrote:
> Marc, You are probabaly correct, but the 2.8 A that I have has a lens
>serial number (2,300,000 - 3,000,000) that falls within the range of those
>that were recalled, mismatched or not mismatched.
>And how would one tell, if infact, the lens is mismatched?
There are two batches of these lenses and I believe the high number is
around 2,6xx,xxx. They were manufactured in 1936 and 1938 or so. Around
1/4 of the lenses installed in the 2.8A were defective: these are mixed in
with no identifiable number runs indicating bad lenses -- the elements were
switched about, I am relatively confident, during coating.
The 2.8/8cm Tessar IS a soft lens: see the commentaries on the Ikoflex III
531/16 from the later 1930's. But the mismatched lenses are REALLY soft,
while the correctly installed lenses are merely a bit soft.
I disagree that the Opton Tessars are all that soft. A bit, yes, but not
badly, and certainly no worse than the Jena lens.
msmall FAX: +540/343-7315
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