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

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  1. tenex

    Why does a smaller objective give a wider field of view?

    Since I often wondered this myself, can we formulate an answer in terms of why components are chosen for 42 vs 32mm models as Binastro notes they tend to be? For example, is it primarily the desire to keep the 42mm model relatively compact?
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