Fixed focal length lens

K9 Optical Glass 100mm Focal Length Double Convex Lens Magnifying Lens

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

Mini Camera Module 2MP IR CUT Fixed Focal Length ISP Processing Chip Webcam Module Board for RPi

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