Varifocal lenses are special lenses that are used with some security cameras. C-mount cameras do not come with lenses. That is primarily due to the complexity of a user's needs and the security application. There are many fixed lenses you can purchase to achieve the shot you are looking for. However, varifocal lenses are a whole different story. Varifocal lenses have a range of settings that allows you to adapt your camera to see at different distances and angle-of-views. This is great because when you have new changes in behavior from people in a store, work environment, or even guest you can manually adjust the zoom and focus on these lenses and capture the video you need to make necessary decisions.
Use 5mm To 100mm Varifocal Lens For Very Long Distances
If you have an application where you need to see very far, use a varifocal lens with a 5mm to 50mm or 6mm to 100mm setting. Know one thing, when you are setting to a long range, you will not have any field-of-view. Long range settings are designed to look at specific things like gates, license plates, and or people's faces. You can bet on this 100%! There are many unique CCTV applications that call for these lenses, the reason to get one that has the varifocal adjustments is so that you can alter or have room to play to get the shot you want. The other reason would be do to the fact, that in CCTV they do not make a fixed lens that is affordable to the public with a 20mm or even 50mm. These lenses would be rare and they are only really available in varifocal lenses. If you have a c-mount where you just need to be able to see up close, then you will mostly likely want to have a varifocal lens with a 5mm to 50mm setting or higher. If you have any more questions about what lens you need for your c-mount security camera, call us and speak to a CCTV consultant today!