Fixed focal length lens

8 PCS M48X0.75 Focal Length Extension Tube Kit 3 5 7 10 12 15 20 30mm Extending Ring for

1080P HD Manual Aperture Zoom 2.8-12mm Focal Length Lens for Security CCTV Camera

5MP HD Fisheye Security Camera Lens 1.7mm Focal Length 185 Degrees CCTV Lens for Fisheye Security Cam

CCTV 3MP 12mm Focal-Length Board Lens Smart Surveillance Replacement Parts for Security Camera