This Sigma 150 500mm review is going to inform you of an ultra-telephoto zoom lens that covers a telephoto range of as much as 500mm and allows photographers to bring the subject extremely close and compress the perspective in their photos.

Sigma's original OS (Optical Stabilizer) function provides the use of shutter speeds around 4 stops slower. It is ideal for sporting activities, wildlife and landscape photography with handheld capturing.

Three SLD (Special Low Dispersion) glass elements provide outstanding correction for chromatic aberration. This lens features a rear focus system that minimizes fluctuation of aberration brought on by focusing.

The super multi-layer lens coating reduces flare and ghosting. High image quality is certain throughout the complete zoom range.

The Sigma 150 500mm incorporates HSM (Hyper Sonic Motor), that guarantees a quiet and high-speed AF as well as full-time manual focusing ability.

The addition of the (optional) 1.4x EX DG APO or 2x EX DG APO Teleconverters develop a 210-700mm F7-9 MF ultra-telephoto zoom lens or a 300-1000mm F10-13 MF ultra-telephoto lens respectively.

Although this lens is relatively large and heavy, it isn't very difficult to mount onto any DSLR body and surprisingly simple to take hand held photos. This lens is great for the heavier 5D and 7D bodies but does turn out to be a bit top heavy on the lighter entry level DSLR bodies such as the 500D and 1000D.

For those who would choose to use this lens on a tripod, the tripod mounting was simple to attach and take out from the quick release plate.

The autofocus was fast and usually accurate in most shooting conditions and the lens focusing and zoom rings moved with little resistance. The fact is, a number of people like stiff focus rings and a few prefer smooth.

People who buy the Sigma 150 500 lens will find a pleasing compromise.

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