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

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  1. B

    An understanding of the term “Twilight Factor”

    I think Twilight Factor is the most misunderstood of all the conventional calculated metrics regarding binoculars and spotting scopes. I am interested in hearing how members interpret this metric and why it is of value. Barry
  2. B

    Hello!

    Hi i just joined this forum after recently purchasing a pair of Trinovid 8x42 binoculars. I am a master optician and astronomer. Anyone having vision or optics questions on binoculars, telescopes or your eyes or glasses, feel free to reach out to me. I will do my best to answer. Barry Santini
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