TS-E 17mm or 24mm on 5Dsr + Toronto

I recently purchased a 5Dsr which I typically use to shoot landscapes with a 17-40 or 24-70. I've decided that I want to get the most out of the camera and want to venture into the world of tilt & shift. I also recently found out that I will be moving to Toronto, Canada for a long period of time. Since I will be living in downtown it just seems everything is lining up for TS photography.

Will the 24mm be wide enough for downtown architecture shooting? It seems the 24 is slightly sharper than the 17, which is another reason I'm leaving toward the 24. Also smaller & allows for screw on 82mm filters.

I've just recently started looking into the TS-E lenses so I have a lot to learn. But, I wanted to throw my situation out there in hopes that the seasoned photographers can guide me toward the right decision.

Thank you & Merry Christmas to you all!

I would lean towards 24mm rather than 17. It won't be wide enough sometimes, but the 17 will often emphasize the foreground too much. 24mm is usually a golden fl in the city for me .

I have the 24mm on a 5Dmk2 and am generally quite happy with it, I read that both the 17 and the 24 take a 1.4 converter very well so the 17 +TC could give you 2 for the price of one.
However before you buy either, rent both to try , they are very specialist tools and take a bit of getting used to to get the best out of them and if you decide its not for you then you have not made an expensive mistake.
Do a lot of reading first so if you do hire one you understand the basics. This http://www.northlight-images.co.uk/article_p​ages/using_tilt.html is a good start

Happy Christmas

From a former professional architecture photographer, wider is almost always better.

I have the 17 and love it.

I have the 17 as well because I like it wide.

With all those megapixels, surely you can crop if needed! Get the 17mm.

Pros of the 17:

Wider - if you like really wide, it is the only option.
Takes 1.4 and 2x TC's quite well, so you have 17, 24 and 35
Can stitch to get really wide ~ 14mm (I use this quite a bit for landscapes with a vertical shift)

Pros of the 24:
Sharper
Also takes 1.4 TC well (and I would assume the 2x as well)
Can buy filters without having to get a specialized filter rig
Filters are cheaper

All-in-all I find the 17, even with a 2x TC 'sharp enough'. However, if you know you don't need 17mm and can get away with occasionally stitching with the 24, then the 24 is definitely better. I got the 17 and have decided to pass on the 24 because the lenses are relatively quite heavy. I might get a 45/50 if they bring out a new one that I can also use with both TCs. A 17 + 2 TC's gives me 3 useful focal lengths with minimum weight. The only filter I use is a polarizer, but it wasn't cheap.

Maybe wait until you get there and see if 24mm is wide enough. Yes, you can stitch, but if you are stitching everything it is a PITA. Just like if you are using the 17 with a 1.4TC 80% of the time, it is a waste (I probably still use it with the 1.4TC 30% of the time).

I am an architecture photographer and the 24mm ts-e is my go to lens. I also have the 17mm, but I only use it about 15% of the time.