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

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  1. jmepler

    Coming off Auto

    You seem to be a bit confused about aperture. Larger numerically is smaller physically. The f-stop (aperture number) is the ratio of the focal length of the lens to the clear aperture. You are correct that a lower number aperture will give you less depth of field, but this is due to the...
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