2.8 isn't pretty. My 40mm Pancake blows it away.
Take a few more shots to rule out focus error.
No this wasn't just focus error. This is representative of what I was seeing with all the images I was taking. My 15-85mm at 24mm and f/4 is even a tad sharper, so this new lens gives me nothing I don't already have in my bag. Back it goes.
Your 15-85 at 24mm f/4 is sharper than the 24 IS at f/4? Or do you mean the 15-85 at f/4 is sharper than the 24 IS at f/2.8?
I meant the former, but also the latter is true obviously.
The lens did get returned and I tried the new 28mm with disappointing results. In fact my results were the opposite of LensRentals quick review. The 24mm sharpened up from f/2.8 to f/4 but didn't sharpen all that much after that. The 28mm, on the other hand, was softer at f/2.8 than the 24mm, sharpened up at f/4 and sharpened even more noticeably at f/5.6.
I would like to try different copies of the new 24mm and 28mm, but I'm not so sure the camera store will let me back in