When we are talking about CCTV Field of View for security cameras we are looking for a linear field of view. Meaning we are looking for the actual measurement in feet and inches. The Horizontal FOV (Field of View) is the width of the view. The Vertical FOV (Field of View) is the height of the view. The overall FOV is a combination of the horizontal FOV and the vertical FOV.

You can even measure it diagonally if you want too but its really not necessary to do that. Now lets talk about how you actually calculate it. If your good at trigonometry you probably already know how to do this.

However, if your not good at it we will show you how it is done. There are a few key factors that are important to know when calculating the CCTV Field of View. Ccs C Compiler Crack Keygen Photoshop. First you must know the CCD imaging device size in the CCTV Security Camera. If you do not know this you will not have an accurate number in your calculations. See the chart for the various CCD sizes and their corresponding actual dimensions that are used to determine the correct field of view. CCD Chip Size 1/3' 1/2' 2/3' 1' Horizontal Variable 4.8 6.4 8.8 12. Where Can I Crash Bandicoot For Pc. 8 Verticle Variable 3.6 4.8 6.6 9.6 Then you need to know at least two of these three items in order to make your calculations. • The Focal length of the lens – Such as 9mm • Distance to the object/scene • Width of the object/scene Normally what you will know is the distance to the object/scene as well as the approximate width.

With that you will be able to calculate the focal length of the lens you will need on your cctv security camera. To help with this calculation we put together a simple spreadsheet CCTV Field of View Calculator. You can download the calculator from our Google sites The calculator assumes that the CCD size you are using is 1/3rd inch since that is the most common size used. Once you have done that you can enter the example below.

As an example if your distance to the object in the scene is 80 feet. The width of the view that is desired is 10 feet.

Calculate Lens selection according to the size of the area. The Field of View Calculator tool is used to help determine proper lens selection prior to installation. Field of View Calculator is used to help predetermine proper lens selection and preview area size that is visible through the lens with entered value.

Enter those numbers into the calculator in the lower section. The resulting focal length of the lens should be 38.4mm. To see how that translates into degrees of view you can enter 38.4 into the upper Focal Length box and you will see the corresponding degree of view in the right circle. It should show 7.15 horizontal degrees of view.

The following chart shows a variety of focal lengths and what the degree of view would be for that focal length and the corresponding linear field of view at the given lengths. Size of Lens FOV Horizontal Degrees FOV & 25 ft FOV @ 50 ft FOV @ 100 ft 50mm 5.5 2.4 4.8 9.6 35mm 7.85 3.4 6.9 13.7 25mm 10.97 4.8 9.6 19.2 16mm 17.06 7.5 15 27.5 12mm 22.62 10 20 40 8mm 33.4 15 30 60 6mm 43.6 20 40 80 4mm 61.93 30 60 120 2.6mm 85.42 46.12 92.3 184.6 Some CCTV installers will carry with them a small circular field of view calculator. That is very handy to have but really its not even necessary.

For a quick and easy way to figure out what size of lens you need you can do the following calculation. You will take the distance to the object and divide it by the desired width for the view and then multiply that by the image size. Referring to the CCD image size chart above you will see that the size for a 1/3rd inch sensor (which is the most common) is 4.8mm for the horizontal measurement. So continuing our example you will take the distance (lets say 80 feet again.) divided by the width of 10 feet and multiply by 4.8. The calculation would look like this.