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pcad
Carpal Tunnel
Reged: 01/17/05
Posts: 1501
Loc: Connecticut
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Re: Undersized prisms - the myth
06/19/08 11:03 PM
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Ed,
Measured the length of the 22x70's to be 15 7/8" with the eye cups rolled down. The eye lens was recessed ~3/8" and the edge of the objective was recessed 7/8" with the dew shields retracted. That leaves ~ 14 5/8" from end to end. With the eye cups and dew shields extended the total length is 18 3/4". The focal length should be ~ 16.5". I'm guessing 20mm FL (0.8")eyepieces. Do you think the prisms path can account for the ~ 2.7" difference? Still seems pretty close to f/6.
Peter
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Peter
Telescopes 25 - 318 mm
Binoculars 15 - 88 mm
Microscope 50x - 1000x
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