You cant really go wrong with either lens. Both are really great quality and IQ is good for both. Canon might have a slightly better build.
04-25-2012 08:13 AM
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Some people hunt with a gun. I use a Canon.
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5th Generation Texian
Since you already have the 70-200, won't the 100-400 make it largely redundant? If your camera body will allow, a 1.4 teleconverter will allow you to get 280mm from your 70-200 for a lot less $$. It isn't 400mm, but to me it is a better solution that costs less and weighs less. Your 70-200 is a jewel of a lens, I just can't see it taking a backseat....
5th Generation Texian.
"Have you broken any rules today? Why not?" -Ken Whitehead 1997
Since you've already bought the Sigma, I suppose my recommendation is a little belated, but for a couple of reasons, I would go with the Canon if finances permit. I own the 120-400mm version of the Sigma (identical optics except for the different front element), and I've found it works best at f/7.1 onward - being noticeably soft at f/5.6. In your case, f/6.3 should be noticeably softer than at f/8 - f/11. The Sigmas also lack focus limiters (which can come in quite handy under demanding circumstances). The weight might also become a drag -- the Canon being the lightest of all at about 3 pounds. For what it is, the Canon is a bargain (I just couldn't afford it!), and it's quite possible that Canon may kill off this lens completely when it introduces it's new 200-400mm f/4 with built in 1.4x extender (for thousands more, of course) later this or next year.
Last edited by henderson2238881; 04-26-2012 at 11:36 PM.
Its a good lens, I use it myself, but besure and check front/back focusing. A majority exhibit it. Its a simple micro adjustment to correct it tho. Mine took +5, but its right on now.
Originally Posted by parrotmomma
So far I'm really happy with this lens. I've not seen any focus issues. Even cropped photos are very sharp. I just couldn't see spending the extra $500 for 100mm less reach. I took it out on WC Loop over Easter weekend, LOL at some of the head turning looks I got! I think it even intimidates my husband.. I do think I'll be looking at monopods, that thing gets heavy after awhile.
I just took this one. f6.3, 1/800, 500mm, 2000 ISO. Hand held. Also on a T2i that I just got for video. What do you think?