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Conversion of a 7x50 binocular to an 18x90 binocular

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Old Friday 30th January 2009, 13:48   #1
birdbrain8
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Conversion of a 7x50 binocular to an 18x90 binocular

The 50mm objectives of a vintage 7x50 binocular were replaced with 90mm objectives. This resulted in an 18x90 binocular with a 5mm exit pupil and a 2.8degree Tfov.
For how to see:

http://www.scribd.com/doc/10315218/Binocular-Rebuild-2
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Old Saturday 31st January 2009, 15:47   #2
stuart C smith
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Quote:
Originally Posted by birdbrain8 View Post
The 50mm objectives of a vintage 7x50 binocular were replaced with 90mm objectives. This resulted in an 18x90 binocular with a 5mm exit pupil and a 2.8degree Tfov.
For how to see:

http://www.scribd.com/doc/10315218/Binocular-Rebuild-2
thank you for posting this . most interesting regards stuart.
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