适马12-24mm是一颗广角变焦镜头，由13组17镜片构成，含4片莹石级极低色散片及1片超低色散SLD镜片和3组玻璃模铸非球面片/1组复合非球面片，优质影像表现无遗。今日笔者了解到，市场上该镜头售价...
Sigma 12-24mm is a wide-angle zoom lens, composed of 13 groups of 17 lenses, 4 pieces of jade like stone steps with extremely low dispersion tablets and 1 pieces of extra low dispersion SLD lens and 3 groups of glass mould casting aspheric tablets group /1 hybrid aspherical tablets, quality imaging performance list. Today the author understands, the market price of the lens...
