The CSL-312A 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-312X employs voltage from the camera's auto-iris port to automatically adjust the amount of light which passes through the lens optical glass and reaches the imager. This feature allows for brilliant lighting in many diverse and changing lighting conditions. However, its extra light gain sensitivity can make the video image too bright under certain direct forward lighting circumstances. When room illumination is likely to remain constant, a manual iris lens in fact offers better overall image quality in many situations. For these types of camera installations, we also carry the CSL-312M.

This lens has a security-industry standard CS-mount lens thread. However, the auto-iris voltage port for this lens is ONLY compatible with the TV-XCS model camera. We offer this same lens for other C-/CS-mount lens cameras, our typical CSL-312A.

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CSL-312X....................................Only $74.95

LENS-SVC......................Professional Shop Lens Installation/Back Flange Adjustment Service
is FREE when lens is ordered with compatible TV-HDCS model camera!

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