I had a couple of situations which made me add a couple of Canon lens to my Amazon wishlist.
After trying to photograph the Milky Way, I was reading that I needed a faster lens then the 18-55 mm f/3.5-5.6 that I was using. So, I found a 24 mm f/2.8 that I thought would be something to try.
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