Originally Posted by Huss
The Nikon 50 1.8G is $197. It is a full frame AF lens, very good, and more than a stop faster than the Sigma. The Sigma is $600??? Three times as expensive???
I dunno. I've seen a lot of work with the Nikon 50/1.8G, had one myself, and was not impressed with it. It seemed to me a fairly mediocre performer, decent for the money as a standard normal kit lens but no challenge to the higher end quality lenses.
What I've seen of the output from the Sigma 45mm f/2.8 looks to be in a different class. I haven't seen the lens in person yet, but I'll make the trip up to a camera shop sometime soon and try it out.