[nightshade]

Looking again on E-bay I find one of the hong kong suppliers now says: This high zoom ratio lens is optimized for digital SLR cameras and capable of covering a wide range of focal lengths from 50mm standard to 500mm ultra telephoto. This ultra-zoom lens employs a seven-group zoom system, which provides a high zoom magnification of 10x. Triple-cam Rear Focusing System ensures high precision throughout the whole focus range.

These are large-aperture lenses with wide angles and short minimum focusing distances. With an abundance of peripheral illumination, they are ideal lenses for Digital SLR Cameras whilst retaining suitability for traditional 35mm SLRs.

Due to the combination of the Nikon D200 camera with this lens can cause improper exposure, Please contact Sigma local shop for free upgrade if this lens you buy is for Nikon D200 Camera. And the lens function properly with any other D-SLR cameras