Canon 300mm f/4 with canon 1.4 or 2X extender (mk3 vs mk2) or 100-400mm

Started Jul 2, 2013 | Questions thread
dhogaza
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Re: Canon 300mm f/4 with canon 1.4 or 2X extender (mk3 vs mk2) or 100-400mm
In reply to bhollis, Jul 3, 2013

bhollis wrote:

In my opinion, for BIF, the most useful features by far are reach, sharpness, and fast AF. And in these respects, the 400 f/5.6L delivers better than any other reasonably priced option, IMO.

IS helps a lot with target aquisition, so to speak.  Getting the camera to lock in can be tricky, and I find that IS helps me get a focus point over the bird much more easily than when the lens is jittery.

300/4 IS + 1.4x AF is plenty fast.  I can add some photos of black terns in flight if you're still not convinced by the swallows and burrowing owl I've already posted (also shot with panning IS).

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