The Canon CN-E 20mm T1.5 L F Cinema Prime Lens is a lens that can be manually focused and is suitable for both Full Frame and Super 35 sensor formats. It has a maximum aperture of T1.5, which is beneficial when you need to shoot in low light or want to achieve a shallow depth of field. The lens has an 11-blade iris that produces round, out-of-focus highlights for a natural bokeh effect. Additionally, the lens barrel allows for 300° of smooth rotation from close focus to infinity, providing a high level of accuracy and consistent focus.

The lens features standard cine lens gears and is designed to minimize focus breathing and also has innovative glass construction that counteracts barrel expansion and contraction to avoid temperature-induced marking discrepancies. It's dual focus, with markings on both sides of the barrel. The rear markings are on an angled surface, making it readable form either side of the camera. It also has a dust- and water-resistant housing to minimize maintenance during normal use.