You will rarely see this much fast glass together. Here are the Canon EF 50mm f/1.0, Leica 50mm f/1.0 Noctilux and the Canon LTM 50mm f/0.95
modified to take a Leica M-Mount.
Here are full sensor images from each one on the body you see. The different FOV has to do with the 5D's Full Frame Sensor, the Leica M8 has a 1.33 and the Epson R-D1 has a 1.5. Each shot is straight out of ACR with defaults. The images were only resizes for posting here.
Canon LTM f/0.95
The light in the room was on small drafting lamp on my desk and a little floor lamp with one of those economy 15 watt green bulbs. ISO 320 was use on the Leica and Canon and 400 on the Epson.