Laowa's first dedicated cinema lens, the OOOM (Out Of Our Minds) 25-100mm T2.9 is the ideal zoom lens for the cinematographer looking to jump from still photo lenses into the world of professional cinema zooms. It's robust build quality and crisp image put it in a class well above it's price tag. The OOOM features a constant T2.9 aperture throughout the zoom range, a 270° focus rotation for smooth, precise focus pulls, standard zoom, focus, and iris gears, and a common 114mm front ring. The optical design is tailored for Super 35 format cameras and is comprised of 20 elements in 16 groups. A 9-bladed aperture makes for very nice, circular bokeh. The package includes Pl mount, Canon Mount (EF) and Sony Mount (E) Features: Zero focus breathing Lightweight T/2.9 9 Aperture blades SPECS Focal Length 25-100mm Max Aperture T2.9 Coverage S35 Lens Mount PL, EF, Sony mount Min. Focus 24" Front Dia. 114mm Filter Thread N/A Length 9.625" Weight 5.5 lbs.