Based on this product's specifications, here are some alternatives and similar models
Lens extra digital 03518DC HD 1/2" 3.5-18mm for CCTV and security cameras
Summary description:
Fixed-mount HD varifocal lens extra digital 03518DC designed for 1/2" image sensors. Focal range 3.5–18mm provides adjustable field of view from wide to tele. Suitable for CCTV and security camera installations, enabling flexible framing and improved scene coverage. Compact metal housing, manual zoom and focus control make it practical for indoor and outdoor surveillance setups.