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

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    Product Review: The Sky Rover Banner Cloud 8 x 42 Binocular

    Nice review, I am always looking forward to your impressions and own measurements of these instruments. May I ask how you measure the apparent FOV? I thought of a couple of methods to do this at home, but I feel like it is harder to measure than the TFOV, I wonder if there is a simpler approach.
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