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

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  1. J

    Introduction and question to the aperture of scopes

    Hi all photographers and experts/tinkers/inventors and birders here. A very big praise to all. A great forum with very familiar terms and a lot of tipps and knowledge and wonderful pictures. For years, I am a "read-only-user" of this forum, because my English is not really good (SORRY!) Google...
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