A versatile, fast aperture telephoto lens for both digital and film SLR cameras.Two ELD glass elements reduce chromatic aberration to a minimum and also ensure sharp, quality images of high contrast.
The new multi layer lens coating reduces flare and ghost, which is a common problem with digital SLR cameras. The overall length of the lens does not changeduring focusing, ensuring convenient handling and ease of use.
The HSM (Hyper Sonic Motor) models provide fast, silent AF function as well as full- time manual focus override. A drop-in 46mm filter holder in the rear part of the lens barrel can be rotated to facilitate the use of filters, including a polarizing filter,
Simply adding an APO teleconverter (optional extra), means that this lens can be used as a 420..m ..4 AF ultra-telephoto lens with a 1.4X EX teleconverter, or a 600mm F5.6 AF ultra-telephoto lens with a 2X teleconverter.
Reviewed by 3 customers
It is a fast sharp lens, must use Sigma converters with it, the lock on the focus ring easy to unlock , then you get an error message from nikon cameras, once relocked no problem
In looking for a cost effective, high quality lens for wildlife & sports, I settled on the Sigma. While not perhaps quite the overall glass quality of a comparable Nikon lens, the cost difference more than makes up for it. Photos are sharp and, when used with the 2X tele-converter, I'm able to shoot most wildlife that I find. A great lens for the price.
I bought this lens mainly for wildlife photography. I use it mostly with the Sigma APO 2x teleconverter and I get some very sharp pictures. Occasionally I wish I had image stabilization but with the fast shutter speeds I use most of the time I do not miss it much. I use it with a monopod except for in flight birds. I had to get a new monopod head and the only heavy duty one I could find was by Really Right Stuff.