F1.6 4.0mm focal length CCTV lens CS mount for sensing game

What is a CCTV lens?
A fixed or board CCTV camera lens has a set viewing angle. … A vari-focal or manual zoom CCTV camera lens can be adjusted by your CCTV technician so it focuses on exactly the area that you wish to record.

* What is field of view?
 In short, field of view is the area of coverage that the camera can ‘see’ within a scene. This all depends on the size of the lens – the higher the number, the narrower a view you have.
This simplified diagram below shows you the sort of coverage you expect from different lens sizes.

* What is field of view?
 In short, field of view is the area of coverage that the camera can ‘see’ within a scene. This all depends on the size of the lens – the higher the number, the narrower a view you have.
This simplified diagram below shows you the sort of coverage you expect from different lens sizes.

A word of warning, field of view alone cannot guarantee you’ll be able to monitor a subject. Other considerations like camera placement and where your subject is, are also important.