The Lens Calculator helps you calculate the focal length of the lens you will need in order to capture a specific scene at a certain distance. See also the viewfinder which will assist you in comparing different angles of view.
Please enter the length values (distance, width , height) specified in the same measurement unit, e.g. meters or feet. Click the button to the right of the parameter you want to calculate.
Width (m/ft)
Height (m/ft)
Sensor
The size of the sensor affects the image quality and the angle of view. A smaller sensor will offer a narrower field of view, if the distance of the camera and focal length of the lens are kept constant. Sensor sizes for Axis network cameras are normally 1/3" ,1/4", 1/2”,2/3”or 1". These nominations correspond to the following physical size.
| Model | WDR-600XX | WDR-560XX | SNR-600XX | UDT-520D | LPR-420DN LPR-520DN |
PTM-520DN | PTM-923WDR PTM-937WDR |
| Sensor Size | 1/3" | 1/3" | 1/3" | 1/3" | 1/3" | 1/4" | 1/4" |
| Physical Size | 4.8 x 3.6 mm | 4.8 x 3.6 mm | 4.8 x 3.6 mm | 4.8 x 3.6 mm | 4.8 x 3.6 mm | 3.2 x 2.4 mm | 3.2 x 2.4 mm |
Lens
The type of lens also determines what angle of view a camera offers. The types of lenses vary from wide angle lenses to tele or zoom lenses. The lens, depending on its focal length, offers a wide or narrow view. Focal lengths are constant but need to be converted in combination with the camera sensor size, to produce the final angle of view.
Camera Lens Angle
| Lens(mm) | 1/3"CCD Left/Right |
1/3"CCD Up/Down |
1/4"CCD Left/Right |
1/4"CCD Up/Down |
| 2.5mm | 96.4° | 86.2 ° | 81.9° | 72.9° |
| 2.8mm | 89.9° | 79.8° | 75.6° | 66.8° |
| 3.6mm | 75.7° | 66° | 62.2° | 54.3° |
| 4mm | 69.9° | 60.7° | 57° | 49.5° |
| 6mm | 50° | 42.6° | 39.8° | 34.2° |
| 8mm | 38.5° | 32.6° | 30.4° | 26° |
| 12mm | 26.2° | 22.1° | 20.5° | 17.5° |
| 16mm | 19.8° | 16.6° | 15.4° | 13.2° |
| 30mm | 10.6° | 8.9° | 8.3° | 7° |
| 60mm | 5.3° | 4.5° | 4.1° | 3.5° |
| 100mm | 3.2° | 2.7° | 2.5° | 2.1° |
| 200mm | 1.6° | 1.3° | 1.2° | 1.1° |