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Canon 100-400mm f/4.5-5.6L IS vs Sigma 50-500 f/4-6.3?
Old 03-19-2007, 07:09 PM   #1 (permalink)
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After doing some research I'm hoping to solicit some opinions. Please offer some insightful comments if you have them.

I own a Sigma 50-500mm f/4-6.3 USM, an I'm considering trading the unit in for a Canon 100-400mm f/4.5-5.6L IS (I have the low end covered, and I'm less concerned about losing high-end of the zoom). My question is essentially whether or not the Image Stabilizer is enough of a reason to "trade-up". I have a few big trips coming up and I'm scratching my head on this one.

Thanks for your help.

- John
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Re: Canon 100-400mm f/4.5-5.6L IS vs Sigma 50-500 f/4-6.3?
Old 03-19-2007, 08:44 PM   #2 (permalink)
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Can't testify to that part of it, but do keep in mind that this is a "push-pull" zoom, which means that air is being pumped in and out of the lens with every zoom motion. If your trips are into dusty country, you might want to consider a different lens, because once dust enters this (or any other) lens, it's extremely hard to remove (much harder than dust on a sensor).

Best zoom for dusty country is a lens with internal zoom and focus (one which doesn't change length when zooming).

FWIW
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