When do I want to use Varifocal Lens Versus a Zoom Lens? And What's the Difference?

When purchasing security cameras, it is important to know what kind of lens will be required. It is best to understand exactly what footage needs to be taken and where. This means that you should have the exact dimensions of the views you need in mind. This will be a very important factor when deciding on the type of lenses you will require to get the most out of your security cameras.

Comparing Varifocal and Zoom Lenses

Varifocal and Zoom lenses differ in focal length and magnification changes. While they are sometimes confused, the lenses are not very alike. Varifocal Lenses do not have fixed positions. Rather, the focus for this type of lens changes with the focal length. When the apertures decrease in size, the focal length increases drastically. They are easier to design and build than true zoom lenses. Zoom lenses have a mechanical assembly which can change the angle view. This means that zoom lenses also do not possess fixed positions. These are the kinds of lenses that are found in binoculars, telescopes, optical instruments, and microscopes. While this type of lens is commonly called a zoom lens, it can also be called a parfocal lens.

Usefulness Of Varifocal Security Cameras

Varifocal security cameras can adjust to the needs of a CCTV surveillance system. Often, these kinds of cameras are in the highest demand. Many people who purchase security cameras for the first time are not sure of the kind of field of view they will require. In these situations, Varifocal cameras are the perfect choice. This is because they are very adaptable to new situations and have a high capacity for marginal error.

Usefulness Of Zoom Security Cameras

Varfocal lenses are extremely good at detailed images ,  mm  m      with high resolution. Images with such magnification and fine detail are often caught with the zoom feature, which leads to its nickname. When purchasing a zoom lens security camera, it is important to know the exact dimensions of the area which will be recorded. If the surveillance system does not have the specified measurements, it will not work properly. This will result in cloudy images, which at worst, will not be able to be used.

Final Differences Between Varifocal And Zoom Lenses

To get the most out of your security cameras, it is vital that the exact dimensions of the secured area be noted. If they are not, the security cameras cannot record quality footage. When zoom lenses are properly set up, they will give the best security footage possible. It produce detailed, high resolution security footage that will not have to leave anything to the imagination. However, if you are unsure of the kind of lens you will need, it would be best to opt for the camera with the Varifocal lens. These kinds of lenses are far more versitile and able to handle differences in focal length and other important attributes for quality videos. Either way, both lenses are great options for any surveillance needs.
Share on Google Plus

About Nguyễn Tiến Cường

This is a short description in the author block about the author. You edit it by entering text in the "Biographical Info" field in the user admin panel.
    Blogger Comment
    Facebook Comment


Post a Comment