Originally posted by Rondec Not certain why everyone thinks that these will be cheap lenses , aka Samyang. Sigma makes some very expensive lenses. I would say that the Sigma 85 f1.4 will probably come in at 800 or 850, considering the current price of Nikon 85mm f1.4 and Canon 85mm f1.2. Sigma sells cheap lenses, but they are the kind of lenses that you'd like to up grade as quickly as possible.
Too bad that they are releasing these lenses with optical stabilization for K mount. From what I understand, this can significantly degrade image quality at times.
as a 3rd-party lens, I think it would be wise for them to compete by selling half or even less than half than what the other lens manufacturer are selling. there are a few great Sigmas that are as good or better than the "L" lenses that are sold cheaper.
although, I don't wanna be pessimistic about the OS system degrading the IQ. as far as I know, the most common problem that we encounter is soft images caused by camera shake.
I believe that with the introduction of an additional OS system which hopefully could contribute to the already existing Pentax SR system, would make it possible to go at 6.5-8 stops slower and thus eliminating much of the necessity of a tripod during walkarounds. I do hate carrying excess weight and baggage. and the luxury of having to use as low as 1 sec or less handheld.
as far as IQ is concerned, I think that the new optical design and construction looks promising. and is a stop-up from the previous design.
if it is true that the initial reports say that these new lenses would be sold at an affordable price, I have hoped that these would cost less than a 1,000.