Cooke Series II -Anastigmat lens-205mm.f4.5-13x18cm

I've acquired this lens yesterday, and perhaps someone can help with
the meaning of the indication that is near the f22 aperture engraving:
"EXT 324 mm". There is two aperture marks, at max aperture, one is at
4.5 obviously, and the other at 8. I suppose this triplet is not
convertible. This lens, as far I could discover was optimized for
portraits and in the lens rear element is written in french to unscrew
it 3 turns to make it sharper.

I've made several searches in different forum archives , at the
article once published by View camera magazine and in Cooke's website
, but nothing specific about this particular lens was found. Any more
details about this lens would be appreciated . Thank you all.

"Manuel Gomes Teixeira" <punctumgt DeleteThis @netvisao.pt> wrote in
message
news:72d79b40.0403231500.13170940@posting.google.com...
 > I've acquired this lens yesterday, and perhaps someone can
help with
 > the meaning of the indication that is near the f22
aperture engraving:
 > "EXT 324 mm". There is two aperture marks, at max
aperture, one is at
 > 4.5 obviously, and the other at 8. I suppose this triplet
is not
 > convertible. This lens, as far I could discover was
optimized for
 > portraits and in the lens rear element is written in
french to unscrew
 > it 3 turns to make it sharper.
 >
 > I've made several searches in different forum archives ,
at the
 > article once published by View camera magazine and in
Cooke's website
 > , but nothing specific about this particular lens was
found. Any more
 > details about this lens would be appreciated . Thank you
all.

This may sound too simple but why not ask Cooke via e-mail?
They seem to have a good sense of the history of their
lenses. They may be able to identify it and also date it for
you.


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Richard Knoppow
Los Angeles, CA, USA
dickburk DeleteThis @ix.netcom.com<!-- ~MESSAGE_AFTER~ -->