It's the equivalent of a shift lens on a camera - it lets you square up the
projected image on a screen when the slide projector is at an angle.
Paul Braun
Certified Music Junkie
"Music washes from the soul the dust of everyday life.". -- Harlan Howard
On Dec 28, 2012, at 0:01, Chris Crawford <chris@xxxxxxxxxxxxxxxxxxxxxx> wrote:
> What's a keystone lens? I've never heard of it, and I'm curious.
>
> --
> Chris Crawford
> Fine Art Photography
> Fort Wayne, Indiana
> 260-437-8990
>
> http://www.chriscrawfordphoto.com My portfolio
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>
> On 12/28/12 12:48 AM, "Paul Braun" <pbraun42@xxxxxxxxx> wrote:
>
>> As I purge my house of unused and old, unnecessary stuff, I came across
>> an old Ektagraphic III that I picked up at a garage sale that's missing
>> the correct lamp carrier. However, it also has a Buhl 3.54" KA
>> Keystopper lens that looks practically new and comes in the original box.
>>
>> I looked on ebay - anyone interested at $30 including shipping? Email me
>> off-list or make another offer.
>>
>> Thanks.
>>
>> --
>>
>>
>>
>> Paul Braun
>> Valparaiso, IN
>>
>>
>> "It's such a fine line between stupid, and clever." - David St. Hubbins
>>
>> "Music washes from the soul the dust of everyday life" - Harlan Howard
>>
>> --
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>
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> _________________________________________________________________
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