1. Product weight: 38 grams 2. Functions: Manual operation, manual focusing, manual adjustment, manual exposure, priority exposure and focusing with the camera body. 3. It is machined from all - metal. The aluminum alloy ring is paired with a fine copper bayonet (which has less wear on the lens), and it has good durability. The inner wall is painted to reduce the possibility of reflection on the CMOS and affecting the imaging. 4. The craftsmanship is delicate, and it fits tightly and smoothly with the bayonet. 5. Color: Silver 6. Material: Metal 7. Package contents: - 1 lens adapter ring Only the above package contents are included, and other items are not included. 8. Precautions: Light and different displays may cause the color of the item to vary slightly from the actual product. The allowable measurement error is +/- 1 - 3 cm.