Feature: 1. Stepless Aperture: Stepless aperture design, equipped with imprint slide mode, to ensure silk transition of video screen exposure, T1.05 aperture, can maintain high image quality in low light and low illumination environments. 2. Long Focusing Stroke: Stepless focusing gear design, ultra long 270° focusing stroke, can be adapted to various follow focus devices, can focus accurately during the shooting process, and make the focus movement more delicate. 3. Vivid Picture: Maximum T1.05, minimum T16 aperture, 13 aperture blades, easy to obtain soft bokeh, making the picture more vivid and not stiff. This is a manual lens, you need to enable M mode in the camera settings to turn on the feature of shutter release without lens. 4. High Quality Material: The use of sturdy all metal material ensures that daily small scratches and harsh environments will not damage the optical components inside the lens. 5. Easy Operation: It only takes ten seconds to change the lens, the size, length and diameter of the series film heads are almost the same, and the positions of the focus ring and aperture ring are the same. It is guaranteed that when using this series of cine lenses, the accessories do not need to be reinstalled, and the stabilizer does not need too much balance adjustment. 6. Low Breathing Effect: By improving the lens structure design, the cine lens has a good control of the breathing effect, which can reduce the focus shift when shooting. Specification: Item Type: Cinema Lens Material: Metal, Optical Glass Gross Weight: 1459g / 51.46oz Lens Support Bayonet: L Format: APS C Aperture Blades: 13 Filter Size: 82mm / 3.23in Focal Length: 25mm / 0.98in Aperture: T1.05-T16 Lens Structure: 11 elements in 9 groups Field of View: 58.6° The Closest Focusing Distance: 0.23m / 9.06in Aperture Ring: Stepless aperture Lens Stabilization: Without stabilization Focus Method: Manual focus Application: Compatible for L mount models, for Leica, for Sigma.. Package List: 1 x Lens1 x Front Lens Cover (Installed)1 x Rear Lens Cover (Installed)1 x Manual6 x Screw