Sigma APO 50-500mm F4.5-6.3 DG OS HSM Lens

This ultra telephoto zoom lens covers a standard range of focal lengths from 50mm to 500mm ultra telephoto range. This lens is equipped with Sigma's unique OS (Optical Stabilizer) function. This system enables hand held photography for many types of subjects such as motor sports, air planes, macro and wildlife. 
Four SLD (Special Low Dispersion) glass elements provide excellent correction of color aberration throughout the entire zoom range. Incorporation of HSM (Hyper Sonic Motor) ensures quiet and high speed AF, while allowing full-time manual focus override. The addition of the optional APO TELE CONVERTER produces a 1000mm ultra telephoto zoom lens.
This lens is ideal for many types of photography such as motor sport, air planes, macro and wildlife. By rotating the zoom ring, it is possible to change the focal length easily from a standard focal length to an ultra telephoto range. This lens has an equivalent angle of view of a 75-750mm lens * when used on digital cameras with APS-C size image sensors.

The lens is equipped with Sigma's own unique OS (Optical Stabilizer) function. This system offers the use of shutter speeds approximately 4 stops slower than would otherwise be possible, making telephoto shooting easy. Mode 1 is ideal for general photography and Mode 2 is designed for panning subjects such as racing cars.

The improved DG lens design corrects for various aberrations. This lens is specially coated to get the best color balance, while cutting down on ghosting caused by reflections from the digital image sensor. The lens provides the utmost correction against lateral chromatic aberration, which is a serious problem for digital SLR cameras. 

Key Features
- Designed for use with full frame digital SLR cameras. May also be used with smaller APS-C size sensors with a corresponding effective increase in focal length to about 75 to 750mm with most cameras. 
- Standard to ultra telephoto zoom range makes this the perfect to carry when you only have room for one lens. 
- The OS system uses two sensors inside the lens to detect vertical and horizontal movement of the camera. It works by moving an optical image stabilizing lens group, to effectively compensate for camera shake. It automatically detects movement of the camera and compensates for camera shake when shooting a moving subject such as motor sports. 
- The HSM (Hyper Sonic Motor) system ensures quiet and high-speed auto focusing with full time manual focus override. 
- Four Special Low Dispersion (SLD) elements provide excellent correction for chromatic aberration. 
- The improved DG lens design corrects for various aberrations. 
- Super Multi Layer (SML) coating reduces ghost and flare. 

Note! If the camera body does not support the HSM motor, auto focus will not work.