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

10x42 FL Diopter adjustment (1 Viewer)

the table at WarehouseExpress says that the centre drive adjustability is -7 diopters and the diopter adjustment is +/- 4.5 diopters.
Centre drive adjustability is how short-sighted your left eye can be and still reach infinity focus, diopter adjustment is the allowable difference between left and right eyes
 
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