Originally Posted by cmpmichael

Sigma 35mm Art is my recommendation if you insist on the 5D.
Although you have slight distortion, the trade off is necessary because hotel rooms can be tight spaces and unpredictable. I've tried 50mm and it's not wide enough.

It is not better-quality than the L-series, but comparable, and definitely think you are right getting sigma instead of canon because of the huge savings.