6x9
Member
The problem is that I don't like ultra wide distortion.
I had a 17-40 from canon. The thing is huge, the quality is OK, but it makes the lines curvy. For some reason, when I have a fridge in the corner of my photo, I like it to be straight. It's very important to me.
There's a distagon 21mm from zeiss, but I'd have to live 10 years on noodles to save up for it.
Get a C Biogon T* 4,5/21 ZM. I own one and love it.
"and exhibits virtually no distortion" This is true for the most part. Plus it is small and the finder is the best.
Unless you are getting a TS-E from Canon, you are going to end up in distortion world.
The Distagon T* 21mm F2.8 has a lot of distortion so I don't know why you mentioned it and not wanting distortion together.