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Originally Posted by Mr. Pickles
If all these cost the same, which would you tend to buy for some sports and some wildlife shooting, and why? All have possibilities, in their own right, and I'm leaning towards one, then the other, then...
Sigma 70-200 f/2.8 HSM
Canon 70-200 f/4 L USM
Sigma 100-300 f/4 HSM
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I instinctively go for the Canon for weatherproofing and superior AF and tracking. Beautiful balance and extremely light [compared to its ƒ2.8 version].
Next is the Sigma 70~200 ƒ2.8, reasonably fast in AF, for a Sigma very smooth focusing but a little lame in the tracking department. IMO Sigma has a fine lens in this one at an attractive price. Sacrifice weatherproofing and [good] tracking ability for the extra ƒ-stop, that’s a tempting proposition and one I’d be inclined to favour.
I’ve been put off the 100~300ƒ4 for relatively poor reviews, it’s reported as noisy, slow AF [no tracking in reality] with less than stellar image qualities unless stopped down 2~3 ƒ-stops, not to be confused with it’s professional ƒ2.8 version but you do pay more.
In my own wandering around recently for a new long lens the Canon 400mm L ƒ5.6 came in for some strong consideration ~ it’s performance is excellent and image qualities are phenomenal. This might be above your budget and 400mm, whilst fantastic is not as versatile as a 70~200 ƒ2.8 and 2x or/1.4x extenders, the ƒ4 lens are not suitable for use with extenders ~ but there is always someone how will show me different,
