No, it is designed for Super 35 sensors. On Full Frame cameras like the Sony A7SIII or Canon R5, it will cause significant vignetting unless used in Crop/S35 mode.
Yes, the Zeiss LWZ.3 is a parfocal lens, meaning the focus remains locked on your subject even as you change the focal length from 21mm to 100mm.
The lens has a standard 114mm front diameter, making it compatible with most professional cinema matte boxes and filter trays.
While the lens supports the Zeiss IMS system, mount changes should be requested at the time of rental to ensure professional calibration and prevent sensor alignment issues.