Item Type: C Mount Lens Material: Aluminum alloy Focal Length: 4mm Image Format: 1/1.8in Resolution: 10MP D/f': F1.8-16 Mount: C Mount Field Angle(HxV) (): 1/1.8in: 103.2 x 76.8 1/2in: 91.3 x 68.05 1/3in: 68.05 x 51. 4 BFL: 17.53mm M.O.D.: 0.1m Dimension: Approx. 39x38mm/1.54x1.5in Lens Structure: Aluminum Alloy + 12G Operation: Iris: Manual Focus: Manual Operating Temperature: -20-+80 Package List 1 x Lens 1 x Adapter Ring 110MP Lens: The lens can be used for high resolution cameras with images up to 10 megapixels, focal length is 4mm, aperture is F1.816. 2Detailed Image Quality: Industrial lens uses advanced glass composites and anti reflective coatings to produce detailed images with high contrast. 3Wide Application: Low distortion, manual Iris can be fixed, high compatibility, the lens can be used for most security camera models. 4Premium Material: Camera lens is made of premium aluminium alloy material, anti rust, wearproof, sturdy, can deal with harsh environment. 5Simple Operation: Manual iris lens is easy to install and disassemble without affecting the installation and use of other accessories, nice replacement.