For Canon EOS Series VILTROX DG-C Camera Automatic Close-up Ring Macro Mount 1. Applicable cameras: for all Canon EOS series 2. Applicable lens: EFEF-S mount lens 3. Configuration: 12mm+20mm+36mm+ front and rear covers 4. Material: metal, plastic 5. Length: 12mm, 20mm, 36mm 6. Inner diameter: 62mm 7. Main lens clear distance: inf.0.5m 8. Scene magnification ratio: 12mm: 0.240.35, 20mm: 0.40.51, 36mm: 0.720.83 9. Coverage: 12mm: 10x156.9x10.3, 20mm: 6x94.7x7, 36mm: 3.3x52.9x4.4 10. Distance between lens and object: 12mm: ab.2116, 20mm ab.1314, 36mm: ab.7.77 11. Exposure factor: 12mm: 1.51.8, 20mm: 22.3, 36mm: 33.4 12. Weight: 72 grams, 84 grams, 112 grams Packing list: -12mm close-up ring x 1 -20mm close-up ring x 1 -36mm close-up ring x 1 -Front cover x 1 -Back cover x 1 -Instruction manual x 1 Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Dadangjia