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

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    Considering a Partial Camera Upgrade - D500 w/ 200-500mm lens

    The 180-600 z is basically the mirrorless version of the 200-500, except its a variable apeture that's even slower at the long end (both worse than fixed 5.6). Fine lens and a nice option in mirrorless, but can't see how it would address any of the concerns they're having.
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    Considering a Partial Camera Upgrade - D500 w/ 200-500mm lens

    Going back to the original post, there's no mirrorless (fill in the brand / model), that would solve the mentioned noise / IQ issues as well or as cost effectively a faster F mount lens would. Upgrading the D500 to full frame mirrorless is fine, and would gain a bit in noise / ISO handling, but...
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    Considering a Partial Camera Upgrade - D500 w/ 200-500mm lens

    The single biggest upgrade you could make to reduce noise and improve image quality is a faster lens. The 200-500 is versatile, but F5.6 is slow, way too slow for high shutter speeds to freeze wings on overcast days w/o a lot of noise. Despite the hype, the D500 auto-focus still rivals any...
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