The 12-50mm CS-Mount 4K Telephoto P-Iris Varifocal Lens from Theia Technologies is designed for image sensors from 1/1.7" up to 1/2.5". The compact design allows you to use this lens for cameras as small as 4" mini-dome size. This lens features motorized zoom, focus, and iris control. It also features an IR cut filter. The lens comes equipped with a limit switch that allows you to perform various functions such as zooming and focus limiting.