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ZEISS DTI thermal imaging cameras. For more discoveries at night, and during the day.

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  1. K

    Binocular Magnification vs Focusing Distance

    Ron, I don't know how relevant this is, but Nikon does in their advertisement literature rather often make mention of their own proprietary optical glasses, including ED glass. I have no further information on this, but perhaps it is conceivable that they indeed do have something that cannot be...
  2. K

    Binocular Magnification vs Focusing Distance

    Ed, Thank you for finding and posting the patent application. It looks very interesting, unfortunately for a while I will not have enough time to read it as closely as would be needed. Henry, Where you have mostly looked at star-tests with traditional astronomical scopes, I have mostly used...
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