Features: M4/3 adapter ring for Canon EOS EF lens to M4/3 series lens for Panasonic&Olympus. No need any other corrective lens for infinity focus and it can reserve the original imaging effects. It only takes 1/2 middle imaging range of full lens also the ideal imaging part with lens performance. All manual operations - manual focus, manual dimming, reach manual exposure with the device,prior aperture exposure, infinity focus. Enjoy reborn old-fashioned lens on digital devices. M4/3 almost fit all kinds of lens, up to 9 kinds of M4/3 rings for film lens/PK/L39/EOS/CY/FD/AI/MD/M42, etc. Original feeling - super precise processing workmanship, closely&smoothly integrated with lens mount. Durable&long service time - made of high class metal, sustainable for long time use. For Panasonic: GF1/GF2/GF3/GF5/GF6/G1/G2/G3/G6/GX1/GX7GH1/GH2/GH3, etc. For Olympus: E-M1/E-P1/E-P2/E-P3/E-P5/E-5/E-PM1/E-PM2OM-D/E-M5/E-PL1/E-PL2/E-PL3/E-PL5, etc. Specifications: Product name: EOS/EF Lens to M4/3 Lens Adapter Ring Application: Convert EOS/EF lens to M4/3 lens Suitable: EOS/EF lens, for Canon; M4/3 lens, for Panasonic&Olympus Weight: Approx 57g/2oz Size: Approx 6.5*6.5*2.9cm/ 2.6*2.6*1.1inch Package list: 1 * EOS to M4/3 Adapter Ring Note: Can not used for EF-S lens! 1、M4/3 adapter ring for Canon EOS EF lens to M4/3 series lens for Panasonic&Olympus. 2、No need any other corrective lens for infinity focus and it can reserve the original imaging effects. 3、It only takes 1/2 middle imaging range of full lens also the ideal imaging part with lens performance. 4、All manual operations - manual focus, manual dimming, reach manual exposure with the device,prior aperture exposure, infinity focus. 5、Enjoy reborn old-fashioned lens on digital devices. M4/3 almost fit all kinds of lens, up to 9 kinds of M4/3 rings for film lens/PK/L39/EOS/CY/FD/AI/MD/M42, etc.