Low Breathing Effect and Manual Focusing: By improving the structural design of the lens, the breathing effect of the film lens is well controlled, which can reduce the length deviation during shooting. This is a manual lens, you need to enable M Mode in the camera settings to turn on the shutter release without lens feature. Soft Bokeh and and Applicable Model: Maximum T1.05, minimum T16 aperture, 12 aperture blades, easy to obtain soft bokeh, making the picture more vivid and not stiff. Cinema lens is compatible for RP R6 R5 and other for EOSR mount cameras. Changing Lenses Takes Just Ten Seconds: The size, length and diameter are almost the same, and the positions of the focus ringand aperture ring are the same. It is guaranteed that when using this series of cinema lenses, the accessories do not need to be reinstalled, and the stabilizer does not need too much balance adjustment. Stepless T1.05 Large Aperture: Stepless aperture design, equipped with imprint slide mode, to ensure silk transition of video screen exposure, T1.05 aperture, can maintain high image quality in low light and low illumination environments. Metal Material: The strong all metal material ensures that the optical elements inside the lens will not be damaged by small scratches and harsh environment.