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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

    It seems to me, the more complex designs that try to achieve large FoVs with long eye relief are to blame in some cases. All my old wide angle porros in 8x30 with very short eye relief, don't suffer all that much from blackouts, while more modern designs do. That's one reason why I am such a fan...
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