Zexon Lens

Zexon Lens:

CCTV lenses are classified based on the mechanism and type of use:

• 1. Lenses fix

• 01.01. Lenses fix industry
• 01.02. Lenses fix mini camera

• 2. Lenses, varifocal (variable focal length)
• 3. Lenses motorize (motor)

One of the most important parts of designing a  Zexon CCTV system is a type of lens.
Why
As noted by light ccd lens has been converted into electrical pulses (0 or -12 v) and delivered to monitoring server, server monitoring for a specific protocol, such as pulses and converted back to image and displays.
If appropriate light Ccd   Nature can not fail to give a good picture of it from a lens with an image of poor quality will not use.
Assume a very high resolution Zexon camera is extremely professional when sufficient light from the ccd Lnzbh   Without guidance, published ccd not a good picture because of the light that passes through the lens and if it is inappropriate ccd lens properties, failure, and how it has changed and therefore the transmitted light ccd   On the basis of incorrect entries, it sends the wrong image.
After selecting the proper lens comes to choosing the right lens quality and efficient in terms of angle and depth of vision is one of the things that are important in choosing a lens choosing the proper focal length lens with a focal length of the lens because of the angle and Whatever the number is, the depth of the lens (mm focal length) is greater than the depth of the lens is smaller than angle lens.
According to this perspective, are inversely proportional to the depth of vision, the angle is less than the depth of vision and depth vision comes from the lower angle is higher.
It is a top choice lens, wide angle of view not because deep down in the same way lens and tele (lenses with focal high) Top view of the depth.
In every lens there is a section called Yryz that the light passing through the lens (in different environments and times of day) is. In some lenses, Yryz to be regulated automatically (Auto iris) Vdvrbyn that this series will be able to use the lens at all hours of the day, the server can send a clear picture of the ideal. In some Yryz to manually adjust the lens   Is (manual iris) and a series of cameras that use lenses Kndd only be able to provide a clear picture of Optic Yryz that it has been adjusted and changed according to the changes of illumination, image outside of normal   It is.

Zexon Camera ip Surveillance fixed lens

They are completely fixed focal length lens and a fixed focal depth and angle due to the well established ones. These lenses are denoted by a number in millimeters. For example, 2.8 mm fixed lens and the focal length as noted above (2.8 mm), indicates the viewing angle (about 150 degrees) and depth of vision (about 8 m).
It has a fixed lens (board mount, cs mount) when they select the proper angle and depth of vision is very clear.

Zexon Camera ip Surveillance varifocal lenses (variable focal distance)
This Zexon lens has a variable focal distance and a variable focal length due to the angle of view and depth intervals with variable focal length lenses generally have two focal series are introduced.
For example, the lens   5 ~ 50 to 50mm is the focal length of 5mm.
Zexon Varifocal lens with a focal length of all primary and secondary focal length of a lens is the distance between the two lenses of the same show.
When we say the focal length of the lens 5 ~ 50 5 mm to 50 mm adjustable and is adjusted so that it is relatively common but mistaken Vqy The lens is 50 miles away up to 1 meter 50 mm is almost.
But actually it is not,   Based on a series of calculations, a distance of 50 meters from the distant 20/1 Show more understanding but because of the ease of lens and lens selection that they give away at a distance of 1 meter to 50 meters. In summary, the lower is the formula for calculating.

Magnification = focal length / distance

It is due to hand (manual) focal length of the network camera  lens varifocal, and the selection and arrangement of the lens changes the focal length with a fixed focal length lens into a convenient and efficient are set to change the focal distance the user manual (only) the possibility that the effective focal length so (see the appropriate angle and depth) at predetermined intervals and set the lens selection.
The network ip camera varifocal lens is one of two levers shift levers of the second lens (focal length) and the other lever to adjust the distance between the first lens to ccd (the clarity of the image) is. Varifocal lens with auto focus was not short of any changes in the location of the two lenses (focal length) is also a need to change the location of the first lens (manual focus).
When the lenses are selected during the initial design to choose exactly the right angle and depth have not been seen in the state of nature can not be the appropriate focal length. (Can not be used to fix a lens), the focal distance is required to select a range of focal, varifocal lens which provide the users are in this range.

camera IP lenses motorize

These lenses change the location of the lens and the focal length of the lens (change magnification, angle of view and depth) and resolution varifocal lenses are exactly the same except that the focal distance with a remote control device or by the motor will change and shift lens first lens for image clarity and transparency is fully automated and intelligent. Lenses, varifocal lens with two focal generally motorize mm are introduced. And commercial modes as well as a number x are also shown. For example, the lens motorize   34x power zoom lens, which represents the number assigned to the initial focal length lens (at wide) focal length of the final lens (at tele) is.
The magnification of the lens motorize [exactly the same lenses, varifocal] among the laymen of the business and is calculated by the following formula.

Magnification = focal length / distance

This calculation is based on the maximum focal length of the lens    motorize the more common are:
(The distance of the object to the camera) zoom = distance / maximum focal length
It network camera motorize lenses are virtually obsolete due to the fact that when the lens is at tele mode (maximum focal length of the first lens and the second lens at the farthest) point of view is very limited to compensate the lack of cover environment need to move the camera and use a rotating basis and due to obsolescence and increasing revolving basis, a complete set of final price (motorize + camera + lens cover out door + fan + base + neck + heater control unit)   These lenses are rarely used (except in very special circumstances).

And now the network camera ip  Speed trap (we will discuss in detail the relevant chapter) set are replaced by the addition of extra features (high speed rotation, careful planning and professional capability, allowing connection of sensors, etc) with fantastic prices The lower   Are.