 Sigma 18- 200mm tele-zoom lens
SLD（Special Low Dispersion）glass and three aspherical lenses provide excellent correction for all types of aberrations. The super multi-layer lens coating reduces flare and ghosting. High image quality is assured throughout the entire zoom range. This lens has a minimum focusing distance of 45cm (17.7”) at all focal lengths, and has maximum magnification of 1:3.9, making it ideal for close-up photography. An inner focusing system eliminates front lens rotation, making the lens particularly suitable for using circular polarizing filters and the petal-type lens hood supplied.
Sigma 18-200mm DC OS lens - Specifications
• Lens Construction: 18 Elements in 13 Groups
• Angle of View: 69.3°－7.1°
• Number of Diaphragm Blades: 7pcs
• Minimum Aperture: F22
• Minimum Focusing Distance: 45cm
• Maximum Magnification: 1:3.9
• Filter Size: Φ72mm
• Lens Hood: Petal-type Hood
• Dimensions: 79mm×100mm / 3.1”×3.9”
• Weight: 610g /21.7oz
About Sigma
After nearly 40 years of pioneering new and better ways to capture and portray the ordinary - and extraordinary - Sigma is still creating new avenues of expression with innovative designs and enhancements in zoom and non-zoom lenses and single lens reflex cameras. As one of the first manufacturers to successfully introduce the interchangeable lens, Sigma's well-earned reputation for originality, innovation and leadership is your guarantee of the world's most advanced line of photographic products. Products you and millions of photographers worldwide turn to when quality, reliability and professional results count most.
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Sigma 18-200mm F3.5-6.3 DC OS lens : The Sigma Corporation is pleased to announce the launch of the new Sigma 18-200mm F3.5-6.3 DC OS lens. This 11.1 times high magnification zoom ratio lens is exclusively designed for digital SLR cameras and is capable of covering a wide range of focal lengths from wide angle to telephoto. It is equipped with Sigma’s own unique OS (Optical Stabilizer) technology. This technology uses two sensors inside the lens to detect vertical and horizontal movement of the camera and works by moving an optical image stabilizing lens group, to effectively compensate camera shake. It also automatically detects movement of the camera and compensates camera shake when shooting moving subjects such as motor sports. 
