Quote:
Originally Posted by Not4wood
I wasn't even talking hand held. I was talking Autofocus on my friends lens. He was complaining big time when he came back from his last trip to South Georgia Island. He said he was in the trees set up to try and get some bird shots. The light level was so low, that this Auto Focus couldn't lock onto to anything it was so dark.
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I haven't noticed any real problem with autofocus on my 300mm. In fact I've been surprised at how quickly and accurately the autofocus works on my D70, and I would only expect the AF-S to work better still. Obviously an f/2.8 lens will be noticably better, but I've never had a problem with AF on the f/4 even with the 1.4x TC. I even used a Kenko MC7 2x TC on my 300mm f/4 to shoot the moon and it managed to autofocus. Of course the moon is quite bright and provides a nice contrast against the dark sky, but it worked none-the-less.