MA series have 14 models, they can compatible with:
CANON,NIKON,OLYMPUS,SONY,PANASONIC,PENTAX,SIGMA,MINOLTA,SAMSUNG,CONTAX,FUJIFILM,KODAK etc cameras.
90 cm 1pc/gift (6.6x2.5x16.5cm)
Ø Two stage release button: halfway pressing for auto focus
Ø Complete pressing takes the picture
Ø Lock the button for long exposures or continuous shooting
Ø Prevents the camera from shaking
Compatible with remote switch model: SIGMA CR-21