The
CS-DN289 can be used to provide a dynamic field of view control
between 2.8mm and 9.0mm 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 lens has
special IR-corrected optics built into the design. This makes the
lens compatible with both visible AND infrared lighting without
a shift in focus between lighting types. Use the CS-DN289 lens with
black & white cameras or Day / Night color cameras (mechanical
IR filter removal required) to get crisp, vivid detail under visible
or IR lighting.
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 CS-DN289
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.
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 CS-DN289. However, this lens is only intended for use with
BOTH visible and infrared (IR) lighting. For proper compatibility,
the camera CANNOT have an IR filter -- or must have a method for
removing the IR filter for use with infrared lighting. Our TV-BCSHR
is the best camera choice for this particular lens.
- Please click
here for more information regarding lens optics and choosing
the right lens.
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