Hello, I am a huge fan of TDP's ISO 12233 chart comparison tool (and the whole website in general), but there's something that intrigues me...

I've compared lenses on both the 1Ds3 and 60D and there seems to be a noticeable difference in the IQ. I am sure the anti-aliasing filter and the sensor play a role, amongst other things, but I didn't know it mattered that much.

I have a canon EOS 7D and I am thinking of replacing my 70-300 IS lens (the black one) with another telephoto lens. I have a few in mind, such as 70-300L and 400 5.6L, but I am not that pleased with the image quality of the lenses on the EOS 60D from the ISO 12233 crops on the site. Especially when the new EF-S 55-250 IS STM has comparable or better IQ than the L lenses on the 60D...

Am I thinking about it too much?