- Extremely wide focal length
- Slow aperture
- Optics are decent, but not excellent
Because of the crop factor, you can't get a full-frame landscape lens and use it on a crop sensor body. That means you have fewer choices here, but the Tokina 11-16 is absolutely, positively, definitely your best bet here. Please don't get sucked into the "the Nikon glass is just better" rhetoric. I've used the Nikon 10-24 and the Tokina 11-16mm lenses extensively, and the Tokina is sharper, faster, optically superior, and a lot cheaper. Get one.