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

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    Telescope light transmission figures

    William Lewis post 1, If you look at the transmission values of other telescopes, see quite few on the WEB-sitee of House of Outdoor, you can notice than the top telesopes I have investigated (Leica, Swarovski, Zeiss, Nikon) also show transmission values of 80-86% so nothing new here. Gijs van...
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