Tag Archives: Cameras

Designed exclusively for Nikon digital SLR cameras, the Sigma 18-200mm f/3.5-6.3 high-zoom-ratio lens covers a host of wide angle and telephoto focal lengths. The lens includes a built-in motor that provides high-speed autofocus, along with two special low dispersion (SLD) lenses and two aspherical glass elements that correct for all types of aberration. Sigma’s super multilayer coating, meanwhile, reduces flare and ghosting and provides topnotch image quality throughout the zoom range. And thanks to the inner focusing system, you don’t have to worry about front lens rotation, making this lens particularly suitable for petal lens hoods and circular polarizing filters. Other features include a minimum focusing distance of 17.7 inches, a maximum magnification ratio of 1:4.4, a compact and lightweight housing, and a zoom lock switch that prevents the lens from creeping due to its own weight. SpecificationsFocal length: 18-200mm Maximum aperture: f/3.6-6.3 Lens construction: 15 elements in 13 groups Angle of view: 76.5 to 8.1 degrees Number of diaphragm blades: 7 Minimum aperture: f/22 Minimum focusing distance: 17.7 inches Maximum magnification: 1:4.4 Filter size: 62mm Mount: Nikon Lens hood: Petal type Dimensions: 2.8 inches in diameter and 3 inches long Weight: 13.9 ounces Warranty: 1 year

This lens design incorporates aspherical lenses and SLD (Special Low Dispersion) glass that provides the utmost correction for all types of aberrations and enables this extended superzoom lens to be housed in a compact and lightweight construction.The power layout of this lens is exclusively designed to suit the characteristics of digital SLR cameras. Two SLD glass elements and two hybrid aspherical lenses offer outstanding correction of various aberrations and produce high-quality images. SLD glass is especially effective in the compensation of longitudinal chromatic aberration, usually evident in tele-photography, and magnified chromatic aberration caused by wide-angle photography. Aspherical lenses…