If possible I wish try and fit the Canon 10-22mm lens to my new Canon 5Dd markll,
i don"t have any wide lens for my new 5d mark ll, except 85mm1.8, 28-135,
2 days ago i preapered money for buy canon lens 17-40, on the last minute when i searched on the photography forums, i saw some people said this not great lens and have some issue on the edge, and something els,
now i just need one wide canon lens, thanks for any advice
Even if you could mount it, the EF-S 10-22mm will not fill up the sensor on a full-frame dSLR (or 35mm SLR, for that matter), as it is designed for the smaller 1.6x crop sensor. Lots (most?) of lenses are 'soft in the corners,' but unless you're making large prints, I doubt it will be a big problem. Don't be a 'pixel peeper' -- worry about your subject and how it's framed. Besides, if they could make lenses 'perfect,' they wouldn't have to keep designing new ones...
The 17-40mm f/4L is one of Canon's "L" lenses, so it'll be of higher quality than the 10-22mm. That wide, the only other options for full-frame are the 16-35mm f/2.8L (more expensive, of course) or the 14mm f/2.8L, which is even more expensive.
You could also check out 3rd party lenses, like the Samyang 14mm f/2.8 (also sold under other names, such as Bower at B&H Photo). I've seen lots of good reviews of that particular one, however it is completely manual, so no auto-focus.
My recommendation is to check out the Canon forums on fredmiranda dot com for reviews and samples images taken with the 17-40mm. (They also have a buy&sell forum, for purchasing used equipment.) And, as someone else mentioned, try it out before you buy (always a good idea with an expensive item).