Lens Mount: C mount / 16MM / Cine. With the adapter, user can use it on Sony NEX-3 NEX-5 NEX-VG10 camera. User can also use it on MFT M4/3 camera (Panasonic G1 G2 G10 GF1 GH2 GH1 GH2, Olympus E-P1 E-P2 E-PL1 E-PL2). * Focus Length: 35mm, Aperture: f/1.7 - f/16 - Close * Focus Operation: Manual; Aperture Operation: Manual * Package includes 35MM F1.7 lens + C - NEX adapter. * Pls note: This lens is good for Portrait Photography, but it not good for Landscape Photography. The sharpness in the center is fine, but the border is soft. It looks like a tilt lens.