Function: Full manual operation, manual focus, manual aperture adjustment, manual exposure with the camera body, aperture priority exposure, and focus. High Quality: All-metal precision machining, aluminum alloy ring body with fine copper bayonet (will not wear the lens), , 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: black Material: aluminum-magnesium alloy Size: 71x42x70mm Package Contents: 1 x EXA-FX Lens adapter ring Only 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.