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T3D Re: viewer optics

  • From: Tom Deering <tmd@xxxxxxxxxxx>
  • Subject: T3D Re: viewer optics
  • Date: Sat, 26 Sep 1998 19:07:09 -0400 (EDT)
On 9/26/98, abram klooswyk wrote:
>Tom Deering wrote (t3d digest 366, 25 Sep 1998 ):
>>My taking lenses will be 80mm, but the closest decent
>>surplus lens I've been able to find is 98mm.
>
>98/80 = 1.225  and  1.225 * 35 mm = 42.9 mm
>Many viewers for 5P format have 45 mm focal length, so they apply
>more than the ratio you want to use. You find them acceptable?
>It's not the extra mm but the ratio that counts. It's about angles
>remember? :-)

Well, that certainly makes sense.  Thank you, Abram.

Tom



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End of TECH-3D Digest 367
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