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

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  1. tenex

    Plastic lenses

    With proper care, glass shouldn't need scratch-resistant coating, because it's harder. And glass comes in many varieties with different optical properties that are useful in various combinations (typically 9-10 elements in each tube) for controlling aberrations. Incidentally, my plastic-lensed...
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