What is the cctv lens?
|CCTV Lens||Industial lens|
W-T: WIDE, TELE optical term, WIDE stands for wide angle or short focus, TELE stands for telephoto or telephoto (adjust focus)
N-F: stands for NEAR, FAR (adjusts the focus)
O-C: OPEN-CLOSE of manual aperture
Note: When installing the lens, it should be changed first.