Sigma APO 150-500mm F5-6.3 DG OS HSM lens
Encyclopedia
The Sigma APO 150-500mm F5-6.3 DG OS HSM lens is a super-telephoto lens produced by Sigma Corporation
. It contains three SLD (Special Low Dispersion) glass elements to provide correction for chromatic aberration. It is aimed toward advanced consumer
level photographers, and is available in Nikon, Canon, Pentax and Sigma camera mounts.
Autofocus is achieved using a moderately fast hypersonic motor for quiet operation. Additionally, all focus elements are internal so in operation the front element does not rotate or extend during focusing, which is useful when a polarizing filter is employed.
Sigma Corporation
is a Japanese company founded in 1961, manufacturing cameras, lenses, flashes and other photographic accessories. All Sigma products are produced in the company's own Aizu factory in Bandai, Fukushima, Japan...
. It contains three SLD (Special Low Dispersion) glass elements to provide correction for chromatic aberration. It is aimed toward advanced consumer
Consumer
Consumer is a broad label for any individuals or households that use goods generated within the economy. The concept of a consumer occurs in different contexts, so that the usage and significance of the term may vary.-Economics and marketing:...
level photographers, and is available in Nikon, Canon, Pentax and Sigma camera mounts.
Technical Information
The optical construction consists of 21 lens elements divided into 15 groups. The 9-bladed diaphragm begins at f/5 when shooting wide open, progressing towards f/6.3 at 500mm. As expected with similar long telephoto zoom lenses, optical quality drops off at the extremes of the telephoto range.Autofocus is achieved using a moderately fast hypersonic motor for quiet operation. Additionally, all focus elements are internal so in operation the front element does not rotate or extend during focusing, which is useful when a polarizing filter is employed.