Woicik Weather Camera at http://woicik.com
I had a couple of situations which made me add a couple of Canon lens to my Amazon wishlist.
Additionally, for the sunsets I was starting to take, I wanted a larger field of view. So, I I found the 10-18mm f/4.5-5.6 lens.
I took a series of pictures with the Canon a tripod to look at the different field of views.
55mm using 18-55mm
18mm using 18-55mm
22mm using 24mm
18mm using 10-18mm
10mm using 10-18mm