If you wanted to buy some Zeiss solutions but couldn't really justify them, you might have stumbled across some forums and comparisons and found this lens. Just google "rokinon vs. zeiss". There are many very positive reviews and most reviewers conclude that they will sell their Zeiss lens and buy 2-3 more Rokinons. Based on that I got this one. That's exactly what you're hoping for. Excellent low light noise free lens. UPDATE: I was shooting in a very dark, shady forest this weekend. The shots were fantastic with limitations coming from my 5d2 and not the lens. There were no video artifacts or compression noise. Each frame was useful and looked great. Can't recommend enough. Next time I'll use 24mm.
Canon EF 50mm f/1.8 II Fixed Lens - Discontinued by Manufacturer
93 Review
Black Canon EF 24-105mm f/4L IS II USM Lens - Model 1380C002
78 Review
Nikon 35mm f/1.8G Auto Focus Lens for Nikon DSLR Cameras - Black (Model 2183)
125 Review
Canon EF 40mm f/2.8 STM Lens - Fixed Black (6310B002) for US Cameras
76 Review