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The HSM on the 15mm f18 is even quieter (if you can image such thing) and moderately quick There are issues with the AF unfortunately, it seems to hunt in low light on a K5iis Edit This lens under certain conditions produces uncharacteristic bokeh, what one forum member called "frogegg" bokehSigma 15mm F18 DC HSM A Lens The first and fastest of its kind Truly a revolutionary product, the Sigma 15mm 18 DC HSM is the first wideangle to standard zoom lens to achieve a large aperture of 18 Designed specifically for APSC sized sensors, the Sigma 15mm 18 translates to 27mm525mm on 35mm cameraThe Sigma 15mm F18 DC HSM Art lens is the world's first constant F18 zoom Designed specifically for SLRs with APSC sized sensors, it covers a 2850mm equivalent range, and is initially available in Canon, Nikon and Sigma mounts with Sony and Pentax versions to follow Dpreview Gear Of The Year Part 4 Sigma 18 35mm F1 8 Dc Hsm Digital Photography Review Sigma 18-35mm f/1.8 dc hsm art lens ...

SIGMA 100mm F3563 DC MACRO OS HSM Contemporary ズーム 広角 標準 望遠 高倍率 単焦点 広角 標準 望遠 マクロ 35mm判換算で27mm300mm相当の画角という、一昔前までは画質に関してある程度目をつぶらざるをえなかった高倍率ズーム。Sigma's 100mm F3563 DC Macro OS HSM Contemporary lens covers an incredible zoom range, but makes compromises to do soSigma 100mm f/3563 DC Macro OS HSM Handling and Features Weighing only 430g, this optic is lighter and slightly more compact than equivalent superzoom lenses from other manufacturers, and it 18 0mm F3 5 6 3 Dc Macro Os Hsm C Sigma America 18-200mm f3.5-6.3 dc macro os hsm c