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-312A
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, making it compatible
with the following Eyespyvideo.com models: TV-CSHRL,
TV-CSHR,
TV-CSHDN,
and TV-BCSHR.
The auto-iris port on these cameras provides seamlessly compatibilty
with the CSL-312A. However, this lens is NOT compatible with the
special auto-iris port built into the TV-XCS
model camera. We offer a variation of the CSL-312A for this camera,
our CSL-312X.
- Please click
here for more information regarding lens optics and choosing
the right lens.
|
