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

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    TIR, prism choice and its effect on image quality

    You can say that again!!!
  2. P

    TIR, prism choice and its effect on image quality

    My brother, who doesn't read Birdforum and as a consequence is blissfully untroubled by most of the technical gobbledygook, says he notices a slight difference in contrast with Abbe-Koening prismed binoculars, but, in his words: "I think I can tell the difference, but can't, hand on my heart...
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