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

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  1. W

    I'm somewhat new to birding and have a question about possible major defects on my spotting scope (see pictures). Kowa TSN-99a

    The spike may be from the erecting lens, I see then when I use an erecting diagonal on my refractor, depends on the optical design if you’ll get one or not. The “dots” are intriguing, certainly shouldn’t be there, don’t look like dried moisture or coating issues, we worth asking Kowa. Peter