1、LARGE APERTURE: F6 large aperture, in darker environments, can effectively improve the shutter speed, the image is still bright in dark environments. 2、COATING: MC multi layer coating is used in backlight environment to effectively reduce glare and purple edge situation, improve lens finish, increase light transmission rate and improve image quality. 3、APERTURE LEAVES: There are as many as 12 aperture leaves, which can produce nearly circular speckles. If the aperture is properly reduced, the effect of 14 stars can be achieved. 4、C MOUNT: Standard C port lens flange distance is short, can be used with a variety of mount camera body adapter ring (adapter ring not included). 5、DURABLE MATERIALS: Manual focus prime lens is made of alloy and premium optical glass, small size and does not occupy space. 1 x Manual Focus Lens Item Type: Manual Focus LensMaterial: Metal, GlassFocal Length: Approx. 35mm/ 1.4inchMaximum Aperture: F 1.6Min. Aperture: F16Mounting: C PortLens Type: Pure Manual LensNearest Focusing Distance: Approx. 0.3m/ 0.98ftMaximum Focusing Distance: ∞Viewing Angle: 18 DegreeStructure: 4 Groups of 4 PiecesCoating: MC Multi LayerBlade: 12 PiecesFilter: Approx. 37mm/ 1.5in Diameter