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

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    Blackouts and objective lens size - 30/32mm vs. 40/42mm

    Blackouts are usually from not getting your eye where the binocular exit pupil is. For binoculars with a long eye, if you don’t wear glasses you may need to have your eyes someway back from the binocular to see the full field with blackouts if you’re too close or far away. This is what many...
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