Originally Posted by
MVers
I found the 24-70 (and all of my 1.4-2.8 lenses) very acceptable using wide open. They are not as sharp as when stopped down a few stops, but plenty sharp. Saying that he will need to use the 24-70 stopped down past f/4 is crazy talk. As for the high ISO thing--yea, you can bump the ISO--but keep in mind when you do so your losing quality and that ISO only takes you so far. If you're using a 40D you can shoot a moving subject at ISO800 instead of ISO1600, and god forbid matters got worse ISO1600 instead of ISO3200. The same even applies to the 5D, 5DII and the 1DsIII. Like IS, ISO is no substitution for a wider aperture.
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