1. Equipped with a aperture of F1.6, which can effectively increase the shutter speed in a dark environment, and the is still in a dark environment.2. In the backlight environment, multi-layer coating is used to effectively reduce glare and purple fringing, lens finish, increase light transmittance, and quality.3. Up to 12 aperture blades, which can nearly circular diffuse light spots. Properly narrowing the aperture can produce 14 effects.4. The standard C-mount lens has a short flange distance and can be used with adapter rings for various bayonet bodies (without adapter rings).5. The lens adopts aluminum alloy and high-quality optical glass, which is small in size and does not occupy space.Specification:Product name: camera lens Length: 35mm/1.4 inMaximum aperture: F1.6Minimum aperture: F16Mount: C mountLens type: pure manual lensThe closest focusing distance: about 0./0.98ftViewing angle: 18 degreeStructure: 4 groups of 4 piecesCoating: MultilayerBlades: 12 piecesAnti-shake: no anti-shakeDistortion: q less than 5%Filter: about 37mm/1.5inColour:blackMaterial:MetalPackage Contents:1 * Camera lensOnly the above package content, other products are not included.Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.