Firstly 14mm-54 and 50-200mm are must haves. This 11mm to 22mm lens is slightly wider at the wide end than the 14mm lens. So what does 11mm bring you that 14mm doesn't? When I'm in a room and I want to convey the atmosphere of the whole room, those few extra millimeters are great for me. When I'm on the street and want to rent an entire building, not just the first few floors, it's very convenient. This lens takes up about 10% of my camera time. When I know I'm going to need it, I move on. Otherwise 14-54mm covers 80% of everything. A quick note: regular screw-on filters will work with this lens, but not like the 14-54 or 50-200. Unlike the 14-54 and 50-200, this lens is the longest and widest. This is his shortest at around 20mm. At 14-54 and 50-200 you generally want to zoom in on the subject. This tends to cover a certain area and you move the lens to cover even more of the area. In short, this is NOT an all-purpose lens, but it does have good range, which is useful. If you want a little more panorama, this might be for you.
Canon EF 40mm f/2.8 STM Lens - Fixed Black (6310B002) for US Cameras
76 Review
Nikon 35mm f/1.8G Auto Focus Lens for Nikon DSLR Cameras - Black (Model 2183)
125 Review
Canon EF 50mm f/1.8 II Fixed Lens - Discontinued by Manufacturer
93 Review
Canon EOS SLR Camera Lens EF 24-105mm f/4 L IS USM
124 Review