Originally posted by ChopperCharles Are people buying these? Am I the only one who just doesn't get it?
Charles.
I'm with you Charles.
The boosters of these cheap Chinese lenses (that's a fact, not an insult) seem to think they're capable of magic. I.e. They've found a way to produce optically excellent lenses for a fraction of the cost of major brands without other significant compromise. The lack of AF certainly helps the price but the 'reviews' fans give this glass isn't realistic. Sigma have just managed to surpass Canon, Nikon and Zeiss with a 35mm 1.4 - Leica still beat everyone and charge people for the excellence.
At best these lenses are using decent optical formulas, good coatings and then wrapping them in inferior casings built to low standards. If that's not the case I expect a major brand to buy them wholesale and borrow their magical powers to take on the rest of the market.
Over time a lot of the value of a lens is how well it holds up, takes knocks, keeps ticking and stays smooth. I'm not sure this glass is built for that at all.