This is a high quality compact prime lens with 25 mm focal length and f/1.4 aperture. - This CCTV Lens features alloy casing with quality lens. - It is ideal for use in bars shops parking lots houses and warehouse etc. - It gives you the widest field of view image available with a C mount lens. - This CCTV Camera Lens provides ultra clear vision for your camera. - Lens can effectively improve the vignetting effect. - This lens is a 25mm lens incorporates advanced optical elements to ensure all-around sharpness and efficient light conductivity. - Solid metal mount lens adapter allows C Mount Movie Lens to be used on micro C-M4/3 camera body. - Suitable for: - With C-M4/3 adapter (included). - Can mount on below camera: Panasonic G1 G2 G3 G10 GF1 GF2 GF3 GH1 GH2etc Olympus: E-P1 E-P2 E-P3 E-PL1 E-PL2etc