CSL-312M

CSL-312M
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  • Use for many versatile applications due to broad focal length adjustment range
  • Ultra wide 2.8mm view to telephoto 12.0mm
  • Manually adjustable iris control allows user to set light gain to suit
  • Compatible with ALL CS-mount 1/3" CCD video cameras


The CSL-312M can be used to provide a dynamic field of view control between 2.8mm and 11.5mm focal lengths. It should be noted that the picture will have an "artifically" wide field of view with some curvarture of the video image for any focal length setting wider than roughly 5.0mm. Unfortunately, there is NO way to provide such a wide viewing angle without this type of distortion. The distortion disappears when the lens is adjusted to a more narrow field of view.

This is a varifocal zoom lens, and all lens adjustments must be made manually by hand. Once the desired focal length is acheived, the lens has thumb screws which tighten to maintain that specific focal length. We also carry fixed focus C-mount lenses for those applications where desired.

The CSL-312M has a manually adjustable iris control as well. This allows the user to adjust the amount of light which passes through the lens optical glass and reaches the imager for a specific amount of available lighting. This lens also has thumb screws which tighten to maintain a desired iris setting. When room illumination is likely to remain constant, a manual iris lens in fact offers better overall image quality in many situations than does an auto-iris lens. We do, though, stock a similar lens with built-in auto-iris ability, our CSL-312A.

This lens has a security-industry standard CS-mount lens thread, making it compatible with the following Eyespyvideo.com models: TV-CSHRL, TV-CSHR, TV-CSHDN, TV-BCSHR , and TV-XCS.

  • Please click here for more information regarding lens optics and choosing the right lens.


Lens Technical Specifications
Lens Focal Length
2.8 mm ∼ 11.5 mm varifocal (manually adjustable) zoom
Lens Aperture (iris)
F1.4 ∼ closed
Iris Control
manual
Focus Control
manual
Input Voltage
N/A
Thread Type
security standard CS-mount style
Approx. Field of View
99.8° H x 72.5° V (134° diagonal) ∼ 25.0° H x 18.7° V (32° diagonal)
Distortion
-56.5% ∼ -2.7%
Back Focal Length
9.75mm ∼ 20.46mm
Flange Back Focal Length
12.5mm
Operating Temperature
-10° C ∼ +50° C
Dimensions
2.4" long x 1.4" diameter / 61mm long x 34.4mm diameter
Weight
3.4oz. / 97.4g
Warranty
one year
Compatible with the following camera models:
Details
SKU 5821000CSL312M
Weight 0.20 lbs
 
Price: $59.95
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10-13-2011
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  • The wide dynamic range (WDR) function of a camera is intended to provide clear images even under extreme light circumstances where intensity of illumination can vary excessively, namely when there are both very bright and very dark areas simultaneously in the field of view of the camera. WDR enables the capture and display of both bright and dark areas in the same frame, in a way that there are details in both areas, i.e. bright areas are not saturated, and dark areas are not too dark. It also offers amazing low light capability.
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  • Feel free to call us at 800-568-9291 for more information.


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