Covers Super35/APS-C Sensors, f/2.8 to f/16 Aperture Range, 74mm Maximum Diameter, 13 Elements in 10 Groups, 72mm Filter Thread, Lens Markings in Feet and Meters, 189.6° Focus Rotation, 1.33x Anamorphic Squeeze. This 24mm f/2.8 Super35 Anamorphic 1.33x Lens from Sirui adds 1.33x anamorphic squeeze to your images to achieve standard 2.4:1 widescreen aspect ratios. Designed for Super35/APS-C cameras with a Leica L mount the lens features an aperture range of f/2.8 to f/16. A lens construction of 13 elements in 10 groups creates the characteristic stretched oval bokeh of anamorphic lenses for a unique cinematic look. The focus ring is capable of rotating 189.6? for intuitive control. A 72mm filter thread allows you to add compatible filters and customize your exposure. Markings on the lens are in both feet and meters. When used with a full-frame sensor the 24mm lens is equivalent to a 25mm lens horizontally.