I agree with the above responses. I own the 24 mm TS-E and absolutely love it, but it's a completely different type of lens. So I wouldn't recommend making a decision based on resolution alone. Each time I use the lens, it is on a tripod, and I'm using live view for focusing. It is a world of difference from hand-holding an autofocus lens. But that's one of the reasons it appeals to me... it forces me to be much more contemplative with my shots, as if I was using an old style view camera. I'm also using 4x6 grad and ND filters with it often, adding to the time and complexity. I appreciate the resolution it gives me, but that's not the prime reason for owning it. So the answer, of course, is to get both