Btaylor: Wow, you do act fast! Congrats on your new lens! I think you'll love the new perspective it gives you...looking forward to some pics from it...


Benjamin: No offense taken...You are right in that there are other qualities to lenses that would make them superior to one another besides just sharpness. A very extreme example would be with the50 1.8and the50 1.2. There are plenty of people I'm sure who may think the 50 1.8 might be as sharp as the 1.2 but then you would have to take into account the extra stops, contrast, bokeh, construction, etc... that you would be getting with the 1.2 (again, extreme example similar to the price difference between those two lenses!) that would make it the superior lens.


For me choosing the 24-105 versus the 24-70 wasn't just about sharpness, I was willing to sacrifice the extra stop for the extra 35mm and the IS.I have found that the 24-70 does perform slightly better at 24mm than the 24-105, there is certainly more vignetting, but I can easily PP that out. In the end, it is a personal preference for one over the other, and what you need out of the lens. Like you said, they are both great lenses.


BTW, I had the 70-200 f4 before getting the 70-200 f4 IS, and don't think the lens is any sharper than the latter, both are very sharp. With that said--I'm thinking about getting the 2.8 IS anyway![]