I am trying to figure out the best wide angle len for wedding portraits. I already have a 50mm 1.8 and a 70-200mm 2.8L IS USM. I want to be able to get a tall building and the bride and groom all in the photo. thanks
There are times however when I wish I still had the 24-70.I've got both a 16-35L and 24L that I'll use. The 16-35 (mark I) edges aren't as sharp as the 24, but I rarely use the edges anyway. I also don't normally shoot group shots at 16mm either. I find that 27-35mm focal length works well. Any wider and distortion becomes an issue.
Another good lens to consider is the Tamron 27-75. Good, inexpensive and sharp. I had one for a while, then sold it (the autofocus is slow and doesn't always lock in low light) and bought the canon 24-70. This is a great lens. I eventually sold it to purchase the 24L which is a wonderful low light lens.
I believe they mentioned that they had a 5D which is a FF, no?
Sigma makes a few, but I like going all the way. If you want wide, nothing beats a fish eye.
I picked up a Sigma 15mm F/2.8 prime fisheye:
I have a different perspective. It is a great church shot but not a great wedding shot, since anyone could be up at the front.