3 products were found matching your search for patent in 1 shops:

Increase maximum aperture by 1 stop. (with a maximum output aperture of f/0.9). Advanced 5-element/4-group optical design incorporating ultra-high index tantalum-based optical glass by Caldwell Photographic in the USA (patent granted).

Industry's best aperture ring covers a 8-stop range with half-stop markings, clearly indicating actual number of f-stops. No more guesswork! (Patent pending). Compatible with both Nikkor G lens & F; lens (include non-AI & AI lens mounts).

The Gitzo GH2781TQR is a “simplified” Centerball head, specifically conceived for travelling. This new head combines lightweight and compactness with a lot of the innovative features. First of all the ball is the revolutionary Gitzo patent pending “Bubble Ball” PTFE treated, mounted on PTFE bushings. Apart from the dramatic weight reduction achieved, this beautiful sphere guarantees an exceptionally smooth operation. Also the locking system is the Gitzo unique and patent pending Spring Assisted Double Lock (SADL) that combines two locking systems in one, maximising both locking power and operation smoothness.