Thread: Lens Cell Cleaning
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  #33  
Old February 19th 11, 03:00 AM posted to rec.photo.equipment.large-format
David Nebenzahl
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Posts: 1,353
Default Lens Cell Cleaning
On 2/18/2011 6:10 PM spake thus:

On 2/18/2011 5:15 PM, Donn Cave wrote:

Quoth (Thor Lancelot Simon): ...

On the other hand, maybe it's not "uncharacteristic". Wollensak
made some awful Tessar lenses and so did a few others. Maybe
Richard knows: is there something about the Tessar design that
makes is particularly prone to manufacturing or Q/C error?

I believe one way to make a Tessar awful is to use it for LF
applications that require a larger circle than it really delivers.

The xenar I am talking about looks bad on 6X9. A 135mm tessar should
easily cover that sharply when stopped down. This one won't.

I guess some lenses are just born bad ...


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