Auto Focus, Precise TrackingTraditional anamorphic lenses often struggle with quick focus acquisition due to the lack of autofocus. The Sirui 20mm T1.8 1.33x anamorphic lens, equipped with an Stm stepping motor, delivers fast, accurate, and smooth autofocus.It also supports eye-tracking, ensuring a stable and precise focus lock, even during high-speed photography or video recording, capturing every decisive moment with clarity.Unlock A New Photography and Film Making ExperienceAF and Mf Focus Modes - Total Creative ControlSeamlessly switch between autofocus and manual focus to meet diverse shooting demands and achieve professional-grade cinematic visuals.20mm Expansive PerspectiveWith a horizontal field of view equivalent to a 22mm full-frame lensthis wide-angle lens captures expansive landscapes, breathtaking starry skies, and tight indoor spaces with ease.0.4m Minimum Focus Distance Stunning Depth and PerspectiveBreaking the technical barriers of anamorphic lenses, the 0.4m minimum focus distance, combined with a fast T1.8 aperture, enhances depth and spatial perception, creating visually immersive shots with striking impact.Wide-Screen Cinematic Aspect Ratio - No Cropping RequiredWith a constant 1.33x squeeze factor, this lens delivers a stunning 2.35:1 widescreen cinematic aspect ratio in 16:9 mode, maximizing sensor utilization for a truly immersive viewing experience.Lens with max image circle of 37mm is most suitable for S35 or almost covers all full frame cameras. Certain amount of vignetting will occur when used in full frame cameras.T1.8 Fast ApertureFast T1.8 aperture makes sure more light enters the sensor so that it can reduce Iso and deliver a pure night scene.Besides, there are 11 aperture blades included. Even in low-light situation, you can get outstanding image with sharp subject, blurred background and soft bokeh.Choose Your Signature Flare - Blue or NeutralClassic Blue FlareSuitable for sci-fi, mystery and music video scenes.Neutral FlareAdapt to light sources for natural and warm commercial or portrait shooting.Stunning BokehUnique lemon-shaped oval bokeh at fast apertureFast Auto FocusImage with sharp subject and dreamy bokehCompact and Lightweight - Perfect for Solo ShootingThis lens is perfect for handheld, vehicle-mounted, or gimbal-assisted shooting..