The Sigma 35/1.4 is optically a little bit better than the Canon. However, resale values on Canon L lenses are generally higher than 3rd party lenses (and if/when Canon releases a 35L II, its much higher price will likely drive UP used 35L prices, meaning you'll likely be able to sell a used 35L for more than you paid).True about the resale value although I highly doubt that will be the case with the 35L, not with the sigma (and the fanbase it builds) around. There are people who would buy a canon lens just cause its canon but i doubt they'll be enough to stop the resale value from tumbling down even with a new lens announced.
Plus, for the sigma as a 3rd party lens, a 35 1.4 of this quality will keep its value for a long, long time. Actually given time i think sigma's price can only go up.
People in the know will pay for quality. That has always been the case, but there are a ton of people out there who have no clue and they know just enough to look for a red ring.
Here's my problem... I'm getting a 5d mkiii this year... but getting this for $600ish (did the math above) will only push me further away from having enough to get the mkiii. I have a whole summer to make it up, but I want to be ready to pounce when the price point I'm looking for pops its head up again.
As for the Sigma... there is so much buzz surrounding it right now and it is all good buzz. The sigma 50 and 30 had caveats... I haven't heard a single bad thing about the new 35mm.
As for the future of the Canon 35... I see the Sigma dragging down the price because people who are in the know will justifiably gravitate to that lens. So the market gets smaller for an already small market of people who are willing to throw down $1300 for a prime lens.
But Canon LOVES to over inflate prices when they launch a new lens or body, so the new 35mm will be $1800 to start and won't see a price decrease for at least a year. I can't see people who already own the 35mm to sell their current to get the mkii, so the market won't be flooded. But I can see retailers selling the lens for $1100 or $1000 as they are trying to clearance their inventory.
So I do see the NEW price point for used being around $900 for a while, down from $1100-1200. And then after the sales are down, the price point should bounce back to $1050-1100. I can't see it getting that much higher.
And I do agree... as the Sigma's reputation strengthens, the price will go up, but I can't see it going to $1300. I think it might peak at around $1050 before settling in around $1000.