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

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    Zuiko 100 - 400 vs 300

    My wife uses both lens and they are equally good lenses in terms of autofocus. Having twice as much light at f/4 helps the autofocus sensors but they are so good on current cameras to be much less of an issue than with older cameras with far fewer AF sensors. I have always taken a zoom lens...
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