This product is designed for the APS-C Crop mode of the specific cameras (eg. 4K 60P Crop mode of Panasonic S1H, S5 and S5K, etc).
Compatible with both Nikkor G lens & F lens (include non-AI & AI lens mounts)
Industry's best aperture clickless ring covers an 8-stop range marking, clearly indicating the actual number off-stops. No more guesswork. (Patent granted)
Parented 5-element/4-group optical design incorporating ultra-high index tantalum-based optical glass by Caldwell Photographic in the USA
Increase maximum aperture by 1 stop
Increase MTF
Makes lens 0.71x wider
Rubber gasket protects the L-mount connection from dust and moisture
Aluminum Alloy and Brass Construction with Chromium Plating