wide angle lens for national park visit?

I'm planning to visit banff national park next month. Currently I have a Tamron 28-75 F2.8 and EF 70-200 F4 on a Rebel XT. I was thinking about getting a good wide angle lens to replace the 18-55 kit lens. My budget is under CAD $1000. Which one would you pick?

EF-S 10-22mm F/3.5-4.5 (CAD $750 from B&H)
Tamron 17-50 F/2.8 (CAD $500)

Any recommendations on a good lens for landscapes?

sigma 10-20

You will really want something in the 10~2X range... So look at either the Canon 10~22mm EF-S or the Sigma 10~20mm EX DC. If you ever plan on going FF the sigma 12~24mm EX DG is worth a look too.

I would get the EFS 10-22, or the Sigma 10-20 is=f cost is a concern. You have 28 mm+ covered competently with th Tamron.

I have the Sigma 10-20. Unbeleivably glad I purchased it too.

Easy. Sigma 10-20.

I've read the reviews of Sigma 10-20 and there were quite a few people mentioned softness on the right side. How does it compare to EF-S 10-22?

05Xrunner wrote in post #3873391
sigma 10-20

I second that one. I love my sigma. Here are some links to sample images I did with it. They aren't the greatest post process, but it gives you an idea of what it can do.

http://a195.ac-images.myspacecdn.com …e7d95a547fc52d2​01146a.jpg
http://a835.ac-images.myspacecdn.com …1b4ba288ce37f68​06e222.jpg

The Canon 10-22 is the best lens, IQ wise, but I hear very good things about the Tokina 12-24.

RikWriter wrote in post #3873648
The Canon 10-22 is the best lens, IQ wise, but I hear very good things about the Tokina 12-24.

I too have heard nothing but good things about the Tonika 12-24 (as well as the Canon 10-22). I would love to get my hands on either one and try them out.

I have the Tokina 12-24mm and use it on a Rebel XT and a 30D, it is an excellent lens, build quality is on par with canon L series. The manual to auto focus switch is also very cool.

aximrocks wrote in post #3873384
I'm planning to visit banff national park next month. Currently I have a Tamron 28-75 F2.8 and EF 70-200 F4 on a Rebel XT. I was thinking about getting a good wide angle lens to replace the 18-55 kit lens. My budget is under CAD $1000. Which one would you pick?

EF-S 10-22mm F/3.5-4.5 (CAD $750 from B&H)
Tamron 17-50 F/2.8 (CAD $500)

Any recommendations on a good lens for landscapes?

17-40L. You don't need a super wide angle in Banff unless you are hiking in the canyons. What you do need is a lens capable of capturing the awesome natural colors of the area. The 10-22 will "shrink" most of the mountain landscape possibilites, reducing the impact of the mountains. I have seen so many shots from super wide angles make what were beautiful, impresive mountains turn into ant hills in a field. It's more of a cartoon than an actual nature shot, IMHO.

Trust me, a standard zoom lens will be much more useful in Banff, and will tell the story of that park in a more natural way.

Another for the Tokina 12-24. Great lens, sharp and excellent build.

Tokina 12-24 vote. f4 throughout the zoom range. Built like a tank. Matches up to a 1.6 sensor beautifully. Wide enough without distortion or fish eye look.

How about the Tamron 11-18mm? You already have a Tamron so you are familiar with their IQ and build quality.

http://www.tamron.com/​lenses/prod/11_18mm.as​p

The only thing you have to be aware of is that this is a Di lens optimized for cameras with APS-C size sensors. If you mount this lens to a full-frame camera, such as the 5D, you'll experience severe vignetting at the edges.