The Sigma 135mm T2 Fully Luminous FF High-Speed Prime Lens takes a close-up shot of the subject, highlighting emotions on the actor's face. This Sigma lens can be used for Canon EF-mount cameras. Its 13 optical elements are placed in 10 groups. You get a 202.5mm focal length with crop sensor cameras. The lens offers full manual adjustment of the focus and iris via dedicated rings for allowing you to determine the look of the shot freely. With the luminous Metric scale markings, you can fine-tune the focus accurately in dark areas. There are integrated dampeners in the rings to minimize the metallic noise if you turn them till the end. Furthermore, these rings have a 0.8 Mod gear pitch for attaching professional equipment such as the follow focus unit. To highlight foreground subjects in medium or close-up shots, the T2 maximum aperture and 9-blade diaphragm create a cinematic shallow depth of field. The 95mm front diameter matches the industry-standard for accepting various types of matte boxes. You may fit 82mm circular filters to the front thread. This Sigma lens is resistant to dust and water splashes to perform flawlessly in harsh conditions.