Re: [APML] Tessar f/3.5 210mm - any good?

["Joseph O'Neil" <joneil@multiboard.com>]

At 00:05 8/17/04 -0700, you wrote:
>I have the above lens, and am considering making a
>camera for use with 4x5 sheet film.  I expect I'll
>need to stop down to about 5.6 (but would rather not).
>  Does anyone have any experience with this lens?  (it
>is a Carl Zeiss Jenna, #3873179.)


         Never used that one for astro-photo work, but the "tessar" desing 
is like the "plossl" design - they  are a 4 element desing, and are usually 
pretty sharp straight on, and stopped down - which is what youa re 
considering using them for.  IN alrge format photogrpahy, the advantage or 
quality you look for a lens is how much larger than the sheet of film is 
the iage circle projected by thelens.  This give you room for movements 
with a view camera.

         On all those Spped & Crown graphics - those proess cameras as they 
call them - you see in movies - the types photogrpahers fromt eh 1940's use 
- often those lenses were a tessar design, as they used very few moveemnts 
on them.  For astro-photo work, I doubt youw ill e moving the film plane at 
all.

         The only concern I ahve in thsi case is most 210mm lenses (which 
is slightly telephoto - 150mm is "normal" for 4x5, as is 50mm for 35mm film 
or 80mm is for 120 film) is that most210mm lenses are around F5.6 - F3.5 
seems rather fast, so I am guessing you will ahve to use ti stoipped down 
once or twice for sure.

         To get a list of specs on large format lenses, go here
http://www.largeformatphotography.info/lenseslist.html

         The whole web site might be of some help to you for any specific 
questions you have.
joe



http://www.oneilphoto.on.ca
http://www.multiboard.com/~joneil
Una salus victis, nullam sperare salutem


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