Feature: 1. Stepless Aperture T1.05 Large 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. 270° Ultra 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. Soft Bokeh and Vivid Picture: Maximum T1.05, minimum T16 aperture, 13 aperture blades, easy to obtain soft bokeh, making the picture more vivid and not stiff. Compatible with for Leica, for Sigma L mount cameras. 4. Changing Lenses Takes Just Ten Seconds: The size, length and diameter of the "Vision" 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 cinema lenses, the accessories do not need to be reinstalled, and the stabilizer does not need too much balance adjustment. 5. Low Breathing Effect and Manual Lens: By improving the lens structure design, the cinema lens has a good control of the breathing effect, which can reduce the focus shift when shooting. This is a manual lens, you need to enable "M Mode" in the camera settings to turn on the "Shutter release without lens" feature. 6. All Metal Material: The use of sturdy all metal material ensures that the optical components inside the lens will not be damaged by daily small scratches and use in harsh environments. Specification: Item Type: 50mm T1.05 L Mount Cinema Lens Material: Metal, Optical Glass Color: As Pictures Shown Weight: Approx. 1.175kg / 2.6lb Lens Support Mount: L Mount Format: APS C Aperture Blades: 13 Pieces Filter Size: Approx. 82mm / 3.2in Focal Length: Approx. 50mm / 2.0in Aperture: T1.05-T16 Lens Structure: 7 Elements in 5 Groups Field of View: 31.8° The Closest Focusing Distance: Approx. 0.5m / 19.7in Aperture Ring: Stepless Aperture Lens Stabilization: Without Stabilization Focus Method: Manual Focus Application: Compatible with for Leica, for Sigma L Mount Cameras. Package List: 1 x Lens1 x Front Lens Cap (Installed) 1 x Rear Lens Cap (Installed) 1 x Manual6 x Screw