How to Pick the Right Camera Lens
8:40 PM // 0 comments // Sajib Barua // Category: //When building a surveillance system in your residence or business a bit planning can go a great distance in ensuring you discover the suitable safety camera and CCTV lens combo. By heeding a few of the following pointers and gaining some information; you will make it that a lot easier to seek out the perfect CCTV lens.
Lens Choice Often Drives Camera Choice
The type of CCTV lens you choose to use with your safety camera can usually drive the kind of camera you will use as well. The rationale for this is due to the fact that totally different fashion safety cameras support totally different format lenses.
If you have already got a safety camera make sure you know what kind of lenses it supports. For instance a mini camera is unlikely to support a zoom or motorized kind lens; whereas a C/CS mount kind safety camera would. The C/CS mount camera nonetheless would not support M12, M9, or different forms of mini CCTV lenses.
CCTV Lens Focal Size
To determine what focal size you'll need you should utilize a lens calculator. You'll first need to assume a set width of view at a specific distance, after which plug this information into the lens calculator to determine what focal size is best suited in your application. Usually a fast google search will help you discover a lens calculator for the different format CCTV lenses on the market similar to 1/3", 2/3", 1/4", etc...
Now something you need to take into account is that after you identify your focal size you need to decide on whether or not you need a fixed focal size or a varifocal kind CCTV lens. The reply to this hinges on if you plan on altering the view at all. If you need to be able to change the view; then you need to find a varifocal kind lens containing your needed size in its range. In case you need not change the view of your camera in any respect; then it might be wise to only persist with a hard and fast focal length.
Realizing The C/CS Mount Lens Difference
Relating to box type security cameras, they are categorized into 2 mounting types; C or CS mount. A lot of the fashionable cameras you see right now use the CS mount format as a result of it allows for the use of each C and CS CCTV lenses.
To have the ability to use a C mount lens on a CS mount safety camera you'll have to be sure you might have the right 5mm adapter ring to allow the lens to get the right distance from the imager. Be warned nonetheless that if this ring is present when you might have your CS mount lens mounted it will not enable for a proper focus, and it could probably harm your CCD imager.
However a CS mount CCTV lens can't be used with a C mount security camera, because it will be unable to get close enough to the imager to attain a proper focus.
Optical Zoom vs Digital Zoom
This subject is considerably more related to the zoom CCTV lenses and the capabilities found on the camera, but it is something good to know when coping with a zoom successful security camera and lens.
Optical zoom is usually the better of the 2 and it is your camera/lenses means to convey the picture in entrance of you nearer with out lack of resolution.
Digital Zoom is your camera simply enlarging a portion of the picture you see and showing it to you. This system leads to a loss of picture quality.
