Image module

Lens CS Mount

Lensa CCTV CS Mount
  • SL-CS25F : 2.5mm 1/3 Fix Iris, CS Interface
  • SL-CS4F : 4mm 1/3 Fix Iris, CS Interface
  • SL-CS6F : 6mm 1/3 Fix Iris, CS Interface
  • SL-CS8F : 8mm 1/3 Fix Iris, CS Interface
  • SL-CS12F : 12mm 1/3 Fix Iris, CS Interface
  • SL-CS16F : 16mm 1/3 Fix Iris, CS Interface

Spesifikasi Lensa CS-Mount

SL-CS25F
Imager Size : 1.3″
Focal length : 2.5mm
Mount Type : CS
Aperture Range : F1.6
Field : 121.5°
Focusing Range : 0.15m
Weight : 33g
SL-CS4F
Imager Size : 1.3″
Focal length : 4mm
Mount Type : CS
Aperture Range : F1.6
Field : 63.8°
Focusing Range : 0.2m
Weight : 40g
SL-CS6F
Imager Size : 1.3″
Focal length : 6mm
Mount Type : CS
Aperture Range : F1.6
Field : 51.6°
Focusing Range : 0.2m
Weight : 40g
SL-CS8F
Imager Size : 1.3″
Focal length : 8mm
Mount Type : CS
Aperture Range : F1.6
Field : 42°
Focusing Range : 0.2m
Weight : 40g
SL-CS12F
Imager Size : 1.3″
Focal length : 12mm
Mount Type : CS
Aperture Range : F1.6
Field : 30.4°
Focusing Range : 0.3m
Weight : 37g
SL-CS16F
Imager Size : 1.3″
Focal length : 16mm
Mount Type : CS
Aperture Range : F1.6
Field : 21.2°
Focusing Range : 0.3m
Weight : 35g
CS Mount Lens speed – the F-stop

A large iris delivers more light into the camera. However, the more ‘telephoto’ the lens the less light will get through. So how do we quantify the practical effect of these contradictory factors? Every CCTV lens has an ‘F-stop’ number describing its maximum capability. For instance, F1.0 can pass four times as much light than an F2.0 lens. Half the F-number, quadruple the light!

Smaller F-numbers are better, which is particularly important for low-light CCTV performance. Wide-angle lenses commonly range from F0.8 to F1.8 while zoom lenses often range from F3.5 upwards, which means much less light gets into the camera. Be aware that such a zoom lens claiming F3.5 will give this at its wide-angle position, but when fully zoomed it could drop to F8.0! This is called ramping and zoom lenses that minimise it cost a lot more money than budget lenses that only look good on paper.

With better resolution tiny details will be clearer and brighter, especially at the edges of the image where all lenses have imperfections, and straight lines will show less curvature (geometric distortion). ‘Aspherical’ optics are particularly finely crafted to maximize light transmission, hence impressive F0.8 capabilities.