Many
a time customers purchase an expensive CCTV Security Camera Kit and
invest their energy, time and money to install it only to discover
that the footage does not serve the purpose of installing the camera.
It
either looks too distant or is too close or does not cover the entire
area.
What
went wrong? Did you install the camera in a wrong place?
No.
Like
any other Camera, one of the most important aspects of a CCTV Camera
is the lens. And there are several parameters of a camera lens that
must be met for a CCTV camera to be effective.
Let
us take a look at the basics of a CCTV Camera lens.
- Focal Length: The focal length of a CCTV Camera determines how much magnification the camera can provide. It is measured in mm and a camera with shorter focal length (e.g. 2.5mm) will provide a wide angle of view whereas a longer focal length (12mm) will provide a narrower angle of view.
- Depth of Field: In simple terms, the depth of field will determine the distance within which the objects will be focussed. For example, in a large depth of field all the objects in the path will be in focus whereas in a small depth of field only a small section of the field of view will be in focus.
- CCD Chip: Most CCTV cameras come in 4 different chip sizes 2/3", 1/2", 1/3" and 1/4".
- Iris: Depending on where you will mount the CCTV camera, you may need to select a manual or an auto iris for the cam. A manual Iris lens is perfect for indoor use whereas an auro iris lens may be required for using outdoors.
- F Stop/Aperture: F Stop or Aperture is the amount of light that the camera will allow depending on the focal length and the aperture opening.
A
combination of all these factors will determine the final outcome of
your CCTV footage. Without getting too technical about this, always
understand that if you want to cover a very wide area like a parking
lot, opt for a smaller focal length lens and mount it at a distance.
If
you want to cover only a small area clearly, then opt for a higher
focal length lens and mount it closer.
I love your site! You will be in our prayers and thoughts! Nice and informative post
ReplyDeleteon this topic thanks for sharing with us.Thank you
Valuable information and excellent design you got here! I would like to thank you for sharing your thoughts and time into the stuff you post!! Thumbs up
SECURITY EQUIPMENT
Really effective way to convey the importance of cctv and its features. Thanks for sharing such a great blog.
ReplyDeleteThanks for sharing such a great blog about CCTV
ReplyDeleteVery informative way to describe the criteria to install CCTV really helped me out of misery, thanks for sharing.
ReplyDeleteReally good to know about it. I am extremely happy
ReplyDeleteso nice
CCTV camera lens does matter alot.
ReplyDeleteSecurity alarm system installation