Quote Originally Posted by josuke7
you guys suggested me to add a wide angle len for my every day use

Everyday use? IMO, an ultrawide zoom is not for everyday use, it's for landscapes, interiors, etc. Even at the long end, they aren't suitable for use as a general purpose lens. For a crop body, the typical general purpose zoom lenses (defined as a lens that spans from moderate wide angle to short telephoto) are lenses like the 17-55mm, the Rebel kit lens (18-55mm), and 3rd party alternatives (Tamron/Sigma 17-50mm).


Your 24-105mm is a great general purpose zoom for a FF camera, but24mm on crop is 38mm FF-equivalent, so that's 'normal' not even wide angle, i.e. 35mm or less.


Quote Originally Posted by josuke7
In that case i want to know which lens you guys more often use between 10-22 and 70-200?

Personally, I use my telephoto zooms (70-200mm, 100-400mm) more than my ultrawide angle zoom (16-35mm). But it depends mostly on what you like to shoot, so only you can really make that call. I found the 70-200mm focal length to be awkward on my 7D - it was too long for indoor use, and too short when I really needed reach (thus the 100-400mm). The best use for the 70-200mm range for me on a crop body was outdoor events (backyard parties, etc.). Once I added a 5DII, the 70-200mm focal length became much more useful to me. But on the balance, even though I found the 70-200mm range awkward, that lens still saw more use than the 10-22mm I had at the time. Once I got the 5DII, I sold the 10-22mm in favor of the 16-35mm - and as I recall, I sold it for only about $50 less than I paid for it, after using it for around a year.


Quote Originally Posted by josuke7
Do you have any other wide angle lens to suggest me because the canon 10-22 is an EFS only, i may upgrade my Canon 50d to a full-frame next year though.

"May upgrade to FF," or, "Will upgrade to FF?" I do think the 10-22mm is the best lens in the crop-body ultrawide class. The only lens that functions as an ultrawide on crop and still works on FF is the Sigma 12-24mm f/4.5-5.6. But, although it fits the focal length needs you have (and is the widest zoom for FF camreas available), the Sigma is slow, and soft even when stopped down (see a comparison at 20mm vs. the Canon 16-35mm II, with the Sigma stopped down by 2 stops to f/11 and the Canon wide open at f/2.8). On your 50D, the really soft corners would be cropped away, but not on FF. Other than the Sigma 12-24mm lens, UWA zooms for Canon FF start at 16/17mm (Nikon has a 14-24mm for FF) - and 16mm on FF is wide angle on a crop body, but not ultrawide.


If you are pretty sure you'll upgrade to FF soon, you may be better off with a less expensive crop body ultrawide. There are several contenders in that area - Sigma's 8-16mm and 10-20mm, Tamron's 10-24mm, and Tokina's 11-16mm, chack Bryan's reviews. If you don't have anything wider than the 24-105mm, then a really inexpensive option to tide you over would be to pick up a used EF-S 18-55mm f/3.5-5.6 IS lens - that's the Rebel kit lens, and I routinely see them on Craigslist for ~$80. It's not a stellar lens, cheaply built, but when stopped down to f/8 it's actually not bad, and it's a cheap way to find out if you like shooting wide angle (when you get a FF body, your 24-105mm will be wider than the 18mm on your 50D).