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With wildlife, 300mm is considered the minimum focal length you want (if we're really talking wildlife out in the wild, and not backyard semi-tame beasties that aren't shy of humans). 400mm is typically considered a minimum for birds. So, it does in some respects depend on what wildlife you're most typically stalking, in terms of how large and how shy they ...


To @Caleb's answer I would add: the accuracy and speed of the focussing mechanism. How quiet the focussing mechanism is. Most lenses are accurate and focus precisely, but they do it at varying speeds. For example, the Nikon 55-300mm AF-S f/4.5-f/5.6 was a nice lens for portraiture and relatively slow moving objects but not animals because: 1) the ...


Yes, it will work, however their are some big caveates that probably make it not worth it. It will be an f/11 lens at the full 800mm focal length as a result of losing two stops of speed from the teleconverter. This means PDAF will be unable to function and you will need to focus manually or use live view and contrast based AF. Additionally, you will be ...


There are a number of guides to selecting lenses on the web -- you should read one or more to familiarize yourself with lens terminology. One you could start with is this one from Briefly, like many engineering endeavors, designing a lens (and choosing which to buy) is a matter of tradeoffs. You want to build (or buy) the best product possible, ...


The general rule of focal length for animals is that too much is never enough. It basically comes down to how much you can afford and are willing to carry. Many nature shots will be in remote places, so lugging the equipment there is a serious consideration. That all said, I'd at least want to go out with a 300 mm lens (relative to a full frame sensor). ...

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