I thought there was something odd about their pricing. Their new 18-200/3.5-6.3 is said to be priced at $720. That's entirely too much money, and too close to the Nikkor model. I'd still like to see them come out with some more killer lenses like the 50/1.4, 150/2.8OS, and 17-50/2.8. Maybe a 300/4, 400/4, and an upgraded 80-400, at 60% the price of the Nikkor, and damn good optics. But, one can dream.
Mark
If Sigma wishes to jack its prices to comparable levels as those of the Canon L-series and the Nikkor gold-ring premium lens designs, then they need to do three things: get rid of their warm, sunset-yellow color rendition; improve wide-open image performance; get a grip on build quality and lens-to-lens assembly quality. Sigma has had issues with all three of these things for decades, over many dozens of lens designs. If a lens is going to be priced at a level comparable to Canon and Nikon offerings, then it damned well ought to be designed well, and assembled properly, otherwise why would anybody buy it. As to this idea that Nikon and Canon introduce lenses at high prices and lower the prices...that's a bit of an oversimplification, and is not in fact how the market actually behaves, and it ignores the longer-term pricing movement of Sigma. Sigma less than 24 months ago just simply RAISED ITS PRICES...as if, suddenly the Sigma name was worth more money.
What they ought to do is do what a smart company would do: create a new brand.
Significant
Malfunction is what the company used to be referred to as. The people at Lensrentals.com have had to drop multiple Sigma lens models because of serious, grave reliability issues. If Sigma wants to really "wow!" people, I think they need to spin off a new name, the way Honda did with Accura. Or the way Canon did with is L-uxury series lenses.
As to the desired lenses on your wish list Mark, like a 150/2.8 OS, 300/4, and 400/4 and a new 80-400 OS--ANY and ALL of those lenses might have a shot at making it. Personally I think the 300/4 and 400/4 or 400/4.5 even, would be good sellers for Sigma. Filling an unfilled niche, at a good price, is what Sigma, Tamron, and Tokina have done for a long time:witness the success of Sigma in off-spec macro lenses like 70mm and 150mm!!! Or 120-300mm f/2.8. Or 11-300mm f/4 EX HSM.
Sigma's new attempt to move up-market is, I think, foolish. The depreciation on anything branded Sigma means it's not a good idea to pay new, full-retail price for Sigma gear that is anywhere close in price to camera-maker gear. A new name might really help them.