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

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  1. T

    The case for the 8x56.

    A 56 mm Habicht W would save you the two air/glass surfaces per barrel of an internal focussing lens, but that's about all. It could no longer use cemented doublets for the objectives and a wide AFoV would demand large and heavy prisms and complex eyepieces with more air/glass surfaces and...