Function: Full manual operation, manual focus, manual adjustment, manual exposure with the camera body, priority exposure, and focus.Material: All-metal precision machining, aluminum alloy ring body with fine copper bayonet (will not wear the lens), durable, and the inner wall is painted and matted to avoid reflection on the CMOS and affect the imaging.Workmanship: The workmanship is very delicate, and it is closely and smoothly combined with the bayonet.Colour:blackMaterial:MetalSize:71 x 42 x 70mmPackage Contents:1 x Adapter RingOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.