Build-in 4 groups, 5pcs optical glasses, manually adjust aperture. (F2-F8 adjusting scale ). Allowing you to get in the larger area of light and achieve the depth of field that you prefer.; Reduced imaging focal length, the actual focal length after using mount adapter for 0.71 times the focal length.;
PLEASE NOTE: While this adapter allows users to mount a F lens on their Micro Four Thirds camera, automatic functions such as autofocus and electronic aperture control will not be supported.; Ring at the bottom with 1/4 screws, which can easy installed on the tripod or other fixed bracket.; it comes with 60-Days return-back guarantee when you received the item but you do not satisfied with our item.