This Camera Field Of View Calculator uses the Lens EFL, Distortion, and an Image Sensor.

Camera Field of View Calculator

A Camera Field of View Calculator. This Picture Shows a Lens Field of View and the Calculator Details.A Camera Field of View Calculator. This Picture Shows a Lens Field of View and the Calculator Details.

Field of view is the angular range viewed by an optical system and a field stop. In cameras which a lens provides full sensor coverage, the field stop is the image sensor. In cameras which a lens does not provide full sensor coverage, the field stop is an internal lens component and/or the image sensor. Any object in front of the camera (e.g. lens hood) can also be a field stop.

The field of view of a camera can be calculated using four parameters:

1.) The effective focal length (EFL) of lens
The EFL of a lens is an optical parameter and should not be confused with the Back Focal Length (BFL) or the Flange Focal Distance (FFD) which are mechanical parameters.

2.) The image sensor active area
The image sensor active area is calculated by using the pixel size and the total number pixels in the resulting image/video. If the output image or video is cropped, the field of view will change.

3.) The relative illumination of a lens
The relative illumination is the reduction of light transmitted through a lens, as a function of position in image space. The camera industry loosely uses the term “Image Circle” as the position in image space where relative illumination is ~50%. 

4.) The distortion of a lens
Lens distortion is an optical aberration resulting from the original optical design. It is a result of a lens having different EFL (magnification) at different regions.

Camera Field of View Equations

The Output from this Calculator

This camera field of view calculator provides three primary values: horizontal field of view, vertical field of view, and diagonal field of view.

The calculator provides the equivalent EFL for a zero-distortion 35mm full frame type lens. For photographers, this can be used to visualize the resulting FoV.

The calculator also has a distortion function to calculate the FoV for wide angle and fisheye lenses. It then calculates the Distortion (%) relative to F-Θ and Rectilinear projections. The distortion equations are a generalized form of the fisheye lens distortion equations described on Wikipedias' Fisheye Lens page.

In practice, lenses diverge from the distortion equations which are used. We recommend using a distortion look up table or polynomial best fit approximation once a specific wide-angle lens has been selected.

This field of view calculator assumes the lens has rotationally symmetric optical components. It does not extend to panamorphic lenses that utilize asymmetrical optical components.

Click below Use our Other Camera Calculators

Lens Focal Length Calculator. EFL Calculator.
Camera Angle of View Calculator. Camera AoV Calculator.
Camera Depth of Field Calculator. DoF Calculator.

Read About Other Camera Engineering Topics

Find a Lens For Your Project Using Our M12 Lens List Or By Clicking Below

1.1mm M12 Fisheye Lens
1.1mm M12 Fisheye Lens
200deg M12 Fisheye Lens
1.1mm M12 Fisheye Lens
CIL211-F2.0-M12IR
210° Fisheye 1.1mm M12 Lens
$49.00
A miniature fisheye 1.5mm M12 lens for All-Sky cameras.
A miniature fisheye 1.5mm M12 lens for All-Sky cameras.
A 1.5mm S Mount RPi mini fisheye lens. The lens has an EFL of 1.5mm, F/# of 1.8, and a M12 Interface.
A fisheye 1.5mm M12 lens. The lens has an EFL of 1.5mm, F/# of 1.8, and a M12 S Mount Interface.
CIL015-F1.8-M12NIR
190° All-Sky 1.5mm M12 Lens
$49.00
135 degree M12 lens low distortion
135 degree M12 lens low distortion
Low Distortion Wide Angle M12 Lens
Low Distortion 1.8mm M12 Lens
Low Distortion S Mount Lens
CIL018-F2.8-M12IR
Low Distortion 1.8mm M12 Lens
$39.00
200° M12 Fisheye Lens
200° M12 Fisheye Lens
200° Mini Fisheye Lens
Mini M12 Fisheye Lens
CIL219-F2.5-M12IR
200° Fisheye 1.9mm M12 Lens
$49.00
Low Distortion 2.2mm M12 Lens
Low Distortion 2.2mm M12 Lens
Low Distortion 2.2mm M12 Lens
2mm M12 Lens Wide Angle No Distortion
Low Distortion 2.2mm M12 Lens
CIL023-F1.8-M12IR
Low Distortion 2.2mm M12 Lens
$39.00
An M12 GoPro Fisheye Lens | 2.8mm M12 Lens
An M12 GoPro Fisheye Lens | 2.8mm M12 Lens
A miniature Rpi wide-angle Lens | A 2.8mm S-mount Lens
A GoPro Fisheye Lens for the Raspberry Pi | A 2.8mm M12 Lens
CIL026-F2.4-M12IR
GoPro 2.8mm M12 Lens
$39.00
A wide angle 2.8mm M12 lens no distortion.
A wide angle 2.8mm M12 lens no distortion.
A 2.8mm M12 lens with a wide angle and no distortion for the RPi HQ Camera.
A wide angle no distortion 2.8mm S Mount Lens.
Low Distortion 2.8mm M12 Lens
CIL028-F2.4-M12IR
Low Distortion 2.8mm M12 Lens
$39.00
190° Fisheye 3.1mm M12 Lens
190° Fisheye 3.1mm M12 Lens
190° Fisheye 3.1mm M12 Lens
3mm Fisheye Lens for M12 Cameras
190° Fisheye 3.1mm M12 Lens
CIL231-F1.8-M12IR
190° Fisheye 3.1mm M12 Lens
$65.00
A 3.3mm M12 lens that is wide angle no distortion.
A 3.3mm M12 lens that is wide angle no distortion.
A 3.3mm S Mount lens for the Raspberry Pi High Quality Camera.
A 3.3mm wide angle no distortion M12 Lens
No Distortion 3.3mm M12 Lens
CIL033-F2.6-M12IR
No Distortion 3.3mm M12 Lens
$39.00
A 3.6mm M12 Lens for 1/2.9
A 3.6mm M12 Lens for 1/2.9
Low Distortion 3.6mm M12 Lens
Low Distortion 3.6mm M12 Lens
CIL036-F2.0-M12IR
Low Distortion 3.6mm M12 Lens
$39.00
A 3.9mm M12 lens that is wide angle no distortion.
A 3.9mm M12 lens that is wide angle no distortion.
A 4K M12 Lens for the Raspberry Pi High Quality Camera. CIL039.
4mm lens on IMX178
A 3.9mm M12 Lens pictured with the Raspberry Pi High Quality
CIL039-F2.4-M12IR
No Distortion 3.9mm M12 Lens
$39.00
F-Θ Wide-Angle 4.0mm M12 Lens
F-Θ Wide-Angle 4.0mm M12 Lens
F-Θ Wide-Angle 4.0mm M12 Lens
F-Θ Wide-Angle 4.0mm M12 Lens
F-Θ Wide-Angle 4.0mm M12 Lens
CIL340-F2.0-M12IR
F-Θ Wide-Angle 4.0mm M12 Lens
$65.00
1.1mm M12 Fisheye Lens
1.1mm M12 Fisheye Lens
200deg M12 Fisheye Lens
1.1mm M12 Fisheye Lens
CIL211-F2.0-M12IR
210° Fisheye 1.1mm M12 Lens
$49.00
A miniature fisheye 1.5mm M12 lens for All-Sky cameras.
A miniature fisheye 1.5mm M12 lens for All-Sky cameras.
A 1.5mm S Mount RPi mini fisheye lens. The lens has an EFL of 1.5mm, F/# of 1.8, and a M12 Interface.
A fisheye 1.5mm M12 lens. The lens has an EFL of 1.5mm, F/# of 1.8, and a M12 S Mount Interface.
CIL015-F1.8-M12NIR
190° All-Sky 1.5mm M12 Lens
$49.00
135 degree M12 lens low distortion
135 degree M12 lens low distortion
Low Distortion Wide Angle M12 Lens
Low Distortion 1.8mm M12 Lens
Low Distortion S Mount Lens
CIL018-F2.8-M12IR
Low Distortion 1.8mm M12 Lens
$39.00
200° M12 Fisheye Lens
200° M12 Fisheye Lens
200° Mini Fisheye Lens
Mini M12 Fisheye Lens
CIL219-F2.5-M12IR
200° Fisheye 1.9mm M12 Lens
$49.00
Low Distortion 2.2mm M12 Lens
Low Distortion 2.2mm M12 Lens
Low Distortion 2.2mm M12 Lens
2mm M12 Lens Wide Angle No Distortion
Low Distortion 2.2mm M12 Lens
CIL023-F1.8-M12IR
Low Distortion 2.2mm M12 Lens
$39.00
An M12 GoPro Fisheye Lens | 2.8mm M12 Lens
An M12 GoPro Fisheye Lens | 2.8mm M12 Lens
A miniature Rpi wide-angle Lens | A 2.8mm S-mount Lens
A GoPro Fisheye Lens for the Raspberry Pi | A 2.8mm M12 Lens
CIL026-F2.4-M12IR
GoPro 2.8mm M12 Lens
$39.00