Have always trusted Sigma Lenses. I'm use to their 85mm and now I'm debating if I need a 50mm in my bag for wider shots in some areas. I've seen it on many canon bodies and it is one of the sharpest lens I've ever seen, and it produces more consistently than dare I say it, something like the legendary 135 f/2 DC . But for some reason I don't see as many people on other websites use it on their Nikons. Even when I do a search on this forum for it I don't see anyone talking about it. Is there a reason for this? Something better out there?