1、Widely Compatible: Lens mount adapter ring can make for Contax, for Yashica CY YC mount lenses compatible with M4/3 series camera system, including for G10 G11 G12, for E P1 E P2 E P3, etc. 2、Premium Material: Lens mount adapter is made of premium aluminum alloy and ABS materials, anodic oxidation process, exquisite workmanship, sturdy and wearable, long service life. 3、Precise Hole Position: This lens mount adapter has precise sizes, the bayonet fits the camera and lens perfectly, tightly combined, easy to install and disassemble smoothly. 4、Rich Features: The camera lens mount adapter supports full manual control, MF, manual exposure, aperture priority, matte paint, suitable for professional photographers. 5、Compact And Portable: This camera lens mount adapter has a compact and lightweight design, which can be easily put into the camera bag, convenient to use anytime and anywhere.