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

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  1. J

    Barska Spotting Scope

    Hi, the Barska is a very fast (probably about f5.5) plain glass refractor - this means that due to an effect called longitudial chromatic aberration the image is going to get soft beyond 45x or thereabouts. Everything beyond that is just empty magnification. Also the 5x zoom EP (125=25x5)...
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