The Sigma 14mm T2 and 135mm T2 FF High-Speed Prime Lens Kit contains two fast lenses that deliver high-quality optical performance. They can be used with Sony E-mount mirrorless cameras. The lenses have individual control rings to adjust the focus and iris manually. Both sides of these lenses have Metric focus scale markings. The rings have integrated dampeners that reduce the metallic noise when they hit the end limit. Additionally, the clickless iris ring offers jerk-free and silent movement. The 9-blade diaphragm of the lenses produces cinematic blur in the background. Also, the aperture opens up to T2 to support video capture in low light. The 95mm front diameter is designed as per the industry standard for accepting a variety of matte boxes and lens motors. You can use professional filmmaking accessories such as a follow focus unit with the 0.8 Mod gear pitch. The metal body resists dust and water to protect the inner parts from environmental elements. With this Sigma lens kit, you receive a carry case that allows convenient transportation of all five lenses. The case has soft foam inlays and padlock inserts to protect the lenses from impacts and bumps.