Sorry to need to ask outright but I've tried to find this info on the forum and I get frustrated and go away.
Currently I'm using a Canon 5D Mark II with an Tamron 28-75mm lens to do most of my landscape and panorama work. I'm finding that 28mm is just too narrow for full 360° panoramas. I have an upcoming project that might require me to do as many as 10, 360° panoramas.
I can't make up my mind between all the options out there, such as the Canon 16-35 f/2.8, the 17-40mm, the 20mm prime, the 24mm prime and a ton of other lens from Canon, Sigma, Tamron, ...
The work needs to stand up to professional scrutiny. I also favor a fast lens because it will give me the best flexibility.
I was all set to buy the 16-35mm the other day but a number of pro friends didn't think it has a good price / performance ration.
What say you?