28mm f/1.8 [or] 35mm f/2.0 ?

I'm looking to get another prime lens and was wondering if I could get some suggestions on which lens has better image quality(sharpness, contrast, colors). I want to get a standard lens to compensate the 1.6 crop factor I have on my 20D. If you've had experience with either lens, you're welcome to give some comments. Thanks!

Canon EF 28mm f/1.8 USM
Canon EF 35mm f/2

AiGTs wrote in post #2091570
I'm looking to get another prime lens and was wondering if I could get some suggestions on which lens has better image quality(sharpness, contrast, colors). I want to get a standard lens to compensate the 1.6 crop factor I have on my 20D. If you've had experience with either lens, you're welcome to give some comments. Thanks!

Canon EF 28mm f/1.8 USM
Canon EF 35mm f/2

I have the 28mm f1.8 becaue I wanted a fast lens with USM but without the size and weight of the 35/1.4 which was not really wide enough for me.

However of the two the 35 f2 should be sharper. I have a comparative of Canon's wide prime MTF data here.

For the 20D/1.6x I would choose the 28/1.8, for larger sensors the 35/2.

I've looked at the 35/2 a couple of times and while the size is perfect and the image quality is top notch I simply can't stand the noisy focusing.

FretNoMore wrote in post #2091627
For the 20D/1.6x I would choose the 28/1.8, for larger sensors the 35/2.

I've looked at the 35/2 a couple of times and while the size is perfect and the image quality is top notch I simply can't stand the noisy focusing.

The 28/1.8 does better on large sensors as its fine detail gets a bit soft just in the corner of the APS-C frame then recovers. However the 35mm should still be sharper on full frame.

However, I would say absolute sharpness to a very high level is often not needed in real life situations.

I'd suggest having a serious look at the Sigma 30mm f/1.4 EX DC HSM

It looks like a cracking lens, optically rivals the 35mm f/1.4 L and is way smaller, also comes with a hood and a case. The focal length translates to 48mm equivalent FOV, so is as close as you can get to 50mm.

You may find this thread useful - I was asking the same questions before

Look at the Sigma 30mm f1.4