Canon’s series of Cinema Prime Lenses offers spectacular 4K-image quality and a full-frame imaging circle in a lightweight and dust/water resistant compact design, making them ideal for any number of applications. This comprehensive line of lenses includes six EF-mount models with consistent form factors and markings optimized for motion picture production. Each Cinema Prime Lens features an 11-blade aperture diaphragm for beautiful bokeh and innovative glass construction which counteracts barrel expansion and contraction, thus avoiding temperature induced marking discrepancies. The control rings on each lens are engineered to maintain the proper amount of resistance with consistent operating torque. For added flexibility, all these lenses share uniform front lens diameters and gear positioning on the focus and iris rings.