Quote Originally Posted by Shoe


So do the EF-S' Focal Lengthsreflect true to the numbers or doesthe 1.6 crop factor still need to be multiplied in?Since reviews for this lens seem to be outstanding across the board, I am re-evaluating my lens combos and (gulp!) my budget. [img]/emoticons/emotion-43.gif[/img]
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17-55 on your 40D would be equivilant to 27-88 on FF. While the lens is actually a 17-55 the crop effect of your 40D essentially makes it a 27-88 effective lens. This is why most will tell you the 24-70 isnt wide enough on your 40D.