SIRUI Nightwalker 16/75mm T1.2 S35 Cine 2-Lens Set - E-Mount, Black

A T1.2 aperture allows significantly more light to reach the sensor, enabling shooting in very low light conditions with lower ISO settings, resulting in cleaner images and pleasing background blur (bokeh).

S35 refers to Super35 format coverage. These lenses are designed to cover the sensor size commonly found in Super35 cinema cameras, providing a natural field of view without excessive vignetting.

The lenses feature matched gear positions for focus and iris rings. This means that when you switch lenses, your follow focus and/or video transmitter will align with the new lens's gears immediately, saving setup time.

While the lenses are designed for S35 sensors, they may project an image circle that covers some full-frame cameras, potentially with vignetting. It's best to check specific camera compatibility for full-frame usage.

Focus breathing is the change in the lens's field of view that occurs as you adjust focus. These Sirui lenses are engineered to minimize this effect for smoother focus transitions.

Yes, although designed for video, the lenses can be used for still photography. However, they are manual focus only and lack electronic communication with the camera body.

An f-stop is a theoretical measurement of aperture, while a T-stop (Transmission stop) measures the actual amount of light transmitted through the lens. T-stops are more precise for cinematographers.

Ensure the red mounting dots align correctly and rotate firmly until the lens locks. Check the camera mount for any obstructions.

Carefully adjust the focus ring. Ensure the lens is properly seated on the camera mount. Verify focus settings on the camera body if applicable.

While minimized, some breathing may occur. Utilize the long focus throw for smoother transitions and consider practicing focus pulls.

The T-stop is adjusted manually via the aperture ring on the lens. Ensure the ring is not set to a locked position if such a feature exists.