but you can still get this lens new from the same online store that I bought mine from for 2/3rds of the price you quoted (see link below)
I'm in Berlin/Germany I'm afraid, and due to the weak Euro prices are climbing and the used gear market is much smaller than in the US.
Or to look at it differently, the 1/25 with the 2.8 becomes 1/60 with the 1.8, 1/80 with 1.4 and 1/100 with 1.2.
But as you know there's a cost - if the subject is close, the dof even at f1.8 is so thin it's unusable for standard run&gun portraits or small group/couple shots. I have the (extremely crappy) 50/1.8 and know about the dof limitations. Imho while wedding clients don't want life-size prints, they do care about people's eyes/faces being out of focus because it kills the *perceived* picture sharpness. And with a thin dof, I'm more likely to screw up.
Since all of your subject matter is going to be middle of the frame (or it should be), edge sharpness is not likely to worry you.
I agree, that's why the Tamron is my current favorite - but better safe than sorry and ask around.
Since the 50 primes are cheap, it wouldn't hurt.
Yes, as long as it isn't the 50L... and Sigma 50/1.4 vs Canon 50L is the same "double the price" issue as 5d2/5d3 or Tamron 24-70 vs Canon 24-70ii.
So okay, I guess maybe I'd suggest to Marsu42 to pick a few lenses and shoot as assistant. When you start making money, then it would make sense to have all of the lenses. You could go 50 prime, 24-70 zoom, 85 prime, 135 prime, flash, tripod, 5D Mk II.
But with all these lenses *I* will need an assistant -) ... however, given the local prices into account few people will shoot with an assistant anyway, so I'll have to work this out on my own. Luckily, I have lots of advice from a pro who has shots weddings (he now does animal portraits & macro, he says he's fed up with being the wedding clown :-)).
Getting more lenses along the way is certainly a good idea, now it's just about the basic setup now to get into weddings and see if it works out. For the time being, I have a 100L IS so I hope that'll make up for not having a 85/135 prime.