MA series have 17 models, they can compatible with:
CANON,NIKON,OLYMPUS,SONY,PANASONIC,PENTAX,SIGMA,MINOLTA,SAMSUNG,CONTAX,FUJIFILM,KODAK etc cameras.

Features:
Two stage release button: halfway pressing for auto focus
Complete pressing takes the picture
Lock the button for long exposures or continuous shooting
Prevents the camera from shaking