Sigma 100-300 f4 APO vs. 80-400 OS?

Started Dec 3, 2005 | Discussions thread
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Chris B.
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Sigma 100-300 f4 APO vs. 80-400 OS?
Dec 3, 2005

I currently have the Sigma 100-300 f4 APO lens which I and others feel is perhaps Sigma's sharpest tele zoom lens but would like a little more reach. I do use it occasionally with Sigma's 1.4x TC. Since I always use the lens on a tripod or monopod, I'm not affected too much by the weight of it. Having recently discovered the benefits of IS on several Canon lenses, I am wondering how the OS of the Sigma compares but more importantly how the sharpness of the 80-400 stacks up against the performance of the 100-300. Can anyone help me out with this?

Thanks in advance for your help!

Chris

 Chris B.'s gear list:Chris B.'s gear list
Canon EOS-1D Mark IV Canon EF 400mm f/4.0 DO IS USM Canon EF 500mm f/4.0L IS USM Canon EF 17-40mm f/4.0L USM Canon EF 70-300mm f/4-5.6L IS USM +1 more
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