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Schneider Convertible 800mm
f/12 APO Tele-Xenar HM Telephoto Lens with Copal #3 Shutter
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The APO-Tele-Xenar is a 5-element telephoto lens
system with an angle of view of 35 degrees, which
can be used with a focal length of 400mm for formats
of up to 13cm X 18cm and with a focal length of
800mm for formats of up to 30cm X 40cm. The
apochromatic correction, achieved by the use of
special optical glass, gives a clear reduction in
the secondary spectrum. The resolution of these
special lenses is not sensitive at the normal
working aperture to changes in the object to image
ratio, with the result that the APO-Tele-Xenar
5.6/400mm can be used without hesitation at a range
of 2 meters. The gray surface of the mounting serves
to reduce thermal effects. To avoid reflections and
to improve transmission the APO-Tele-Xenar has a
multi-layer, anti-reflection coating. |
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Optical Construction |
5
elements |
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Shutter |
Copal 3 |
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Shutter Speeds |
1/125th to 1 Second + B & T |
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Aperture Range |
f/12-64 |
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Angle of view |
35° |
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Image Circle |
496mm |
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Filter Size |
M
135 x 1 |
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Negative Size |
>
8x10" |
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Weight |
2500g |
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