7artisans 10mm/16mm/25mm/35mm/50mm/85mm T2.1 Cine Lens for Canon RF Mount APS-C 260° Ultra Long Focus Large Aperture Prime Mirrorless Camera Lens for Portraiture/Street Photography/Humanistic(35mm)

There aren't many choices for the RF mount, this is one of the better built and optically formidable lenses to choose from when shooting video. This 25mm T2.1 is for APS-C but I will be using it in crop mode on my R5 which will give me a 40mm output. The focus and aperture rings turn extremely smoothly, and there aren't any loose parts with respect to tolerances. You can use a follow focus with great effect as both focus/aperture rings are geared. At any price point, the build quality is stellar, and the optics are very, very good (you can stop down a bit to achieve optimal sharpness). You'd be hard pressed to find a video-centric lens, with exceptional build, and good optics in this price category. Highly recommended.