This Camera EFL Calculator Provides the Lens Effective Focal Length From a Target Field of View.

Lens Focal Length Calculator

A Lens Focal Length Calculator Description. Used for CCTV Cameras to find the Lens EFL.

This Camera Effective Focal Length Calculator helps you decide which lens to use with your camera or image sensor. The calculator takes your target field of view (angle of view) and camera specification then provides the maximum lens EFL.

The Optical Effective Focal Length (EFL) should not be confused with the Mechanical Back-Focal Length (BFL). The EFL determines the field of view of the camera while the BFL determines whether a lens will focus on a camera.

The calculator uses a simple field of view equation and does not currently incorporate optical distortion.

Click below Use our Other Camera Calculators to Complete Your Camera Design

Camera Field of View Calculator. FoV Calculator
Camera Depth of Field Calculator. DoF Calculator.
Camera Angle of View Calculator for Camera Lens Selection. AoV Calculator.

Find A Lens for Your Project

All-Sky 1.5mm M12 Fisheye Lens

The CommonLands CIL01.5-F1.8-M12 is a high resolution miniature fisheye lens. The lens has an EFL of 1.5mm, F/# of 1.8, and a M12 S Mount Interface.
The CommonLands CIL01.5-F1.8-M12 is a high resolution miniature fisheye lens. The lens has an EFL of 1.5mm, F/# of 1.8, and a M12 S Mount Interface.
The CommonLands CIL01.5-F1.8-M12 is a high resolution miniature fisheye lens. The lens has an EFL of 1.5mm, F/# of 1.8, and a M12 S Mount Interface. It is pictured with the Raspberry Pi High Quality Camera.
The CommonLands CIL01.5-F1.8-M12 is a high resolution miniature fisheye lens. The lens has an EFL of 1.5mm, F/# of 1.8, and a M12 S Mount Interface.
A full circular fisheye output image with 190 degrees field of view
$39.00

Fisheye 2.2mm M12 Lens

The CommonLands CIL02.2-F1.8-M12IR is a high resolution, fisheye, 2.2mm F/2.2 M12 S Mount Lens for 12MP+ M12 Cameras.
The CommonLands CIL02.2-F1.8-M12IR is a high resolution, fisheye, 2.2mm F/2.2 M12 S Mount Lens for 12MP+ M12 Cameras.
The CommonLands CIL02.2-F1.8-M12IR is a high resolution, fisheye, 2.2mm F/2.2 M12 S Mount Lens for 12MP+ M12 Cameras. Great for Security and Robotics Applications.
The CommonLands CIL02.2-F1.8-M12IR is a high resolution, fisheye, 2.2mm F/2.2 M12 S Mount Lens for 12MP+ M12 Cameras.
A fisheye image output with a 200 degree high resolution S-Mount lens. Taken on the Raspberry Pi High Quality camera.
$39.00

GoPro 2.6mm M12 Lens

This is a high resolution 2.6mm M12 GoPro Replacement Lens | S-Mount Lens GoPro 2.6mm M12 Lens
This is a high resolution 2.6mm M12 GoPro Replacement Lens | S-Mount Lens GoPro 2.6mm M12 Lens
The CommonLands CIL02.6-F2.4-M12IR is a high resolution, wide-angle, 2.6mm F/2.4 M12 S Mount Lens for 12MP+ M12 Cameras. Great for Home Security Applications.
The CommonLands CIL02.6-F2.4-M12IR is a high resolution, wide-angle, 2.6mm F/2.4 M12 S Mount Lens for 12MP+ M12 Cameras. Great for the Raspberry Pi High Quality Camera..
A 2.6mm EFL M12 Lens with 16MP resolution. An image with a ImaTest SFRPlus test chart.
$39.00

Drone 2.8mm M12 Lens

The CommonLands CIL028-F24-M12IR is a high resolution, wide angle, low distortion, 2.8mm F/2.4 M12 S Mount Lens for 12MP+ M12 Cameras.
The CommonLands CIL028-F24-M12IR is a high resolution, wide angle, low distortion, 2.8mm F/2.4 M12 S Mount Lens for 12MP+ M12 Cameras.
The CommonLands CIL028-F24-M12IR is a 2.8mm F/2.4 M12 S Mount Lens for and is pictured on the Pi HQ Camera.
The CommonLands CIL028-F24-M12IR is a 2.8mm F/2.4 M12 S Mount Lens for and is pictured mounted in the Pi HQ Camera.
A 2.8mm EFL M12 Lens with 16MP resolution and no-distortion. An image with a ImaTest SFRPlus test chart.
$39.00

Cellphone 4.2mm M12 Lens

The CommonLands CIL04.2-F2.4-M12IR is a high resolution, wide angle, low distortion, 4.2mm F/2.8 M12 S Mount Lens for 12MP+ M12 Cameras.
The CommonLands CIL04.2-F2.4-M12IR is a high resolution, wide angle, low distortion, 4.2mm F/2.8 M12 S Mount Lens for 12MP+ M12 Cameras.
The CommonLands CIL04.2-F2.4-M12IR is a high resolution, wide angle, low distortion, 4.2mm F/2.8 M12 S Mount Lens for 12MP+ M12 Cameras. This is ideal for video conferencing cameras.
The CommonLands CIL04.2-F2.4-M12IR is a high resolution, wide angle, low distortion, 4.2mm F/2.8 M12 S Mount Lens for 12MP+ M12 Cameras such as the Raspberry Pi HQ.
The output from a 12MP lens with 4.2mm focal length. Taken with the Raspberry Pi High Quality IMX477 sensor.
$39.00

Portrait 6.0mm M12 Lens

The CommonLands CIL06.0-F2.8-M12IR is a high resolution 6.0mm F/2.8 S-Mount M12 Lens for 4k+ M12 Cameras.
The CommonLands CIL06.0-F2.8-M12IR is a high resolution 6.0mm F/2.8 S-Mount M12 Lens for 4k+ M12 Cameras.
The CommonLands CIL06.0-F2.8-M12IR is a high resolution 6.0mm F/2.8 S-Mount M12 Lens for 4k+ M12 Cameras.
The CommonLands CIL06.0-F2.8-M12IR is a high resolution 6.0mm F/2.8 S-Mount M12 Lens for 4k+ M12 Cameras.
The output image from a 6.0mm M12 lens on the Sonyy IMX477 image sensor.
$39.00

Wide-Angle 3.2mm CS Mount Lens

The CommonLands CIL03.2-F1.8-CSNOIR is a 3.2mm F/1.8 CS Mount Lens for 12MP+ CS Cameras such as the Raspberry Pi HQ Camera.
The CommonLands CIL03.2-F1.8-CSNOIR is a 3.2mm F/1.8 CS Mount Lens for 12MP+ CS Cameras such as the Raspberry Pi HQ Camera.
The CommonLands CIL03.2-F1.8-CSNOIR 3.2mm EFL lens is pictured with the Raspberry Pi HQ Camera.
The CommonLands CIL03.2-F1.8-CSNOIR 3.2mm EFL lens is pictured next to the Raspberry Pi HQ Camera.
Wide Angle 12MP 3.2mm CS Mount Lens Wide-Angle 3.2mm CS Mount Lens
$59.00

Cellphone 5.0mm CS Mount Lens

The CommonLands CIL05.0-F2.0-CSNOIR is a 12MP+ wide angle 5.0mm F/2.0 CS-Mount Lens for 12MP+ CS Mount Cameras.
The CommonLands CIL05.0-F2.0-CSNOIR is a 12MP+ wide angle 5.0mm F/2.0 CS-Mount Lens for 12MP+ CS Mount Cameras.
The CommonLands CIL05.0-F2.0-CSNOIR is a 12MP+ wide angle 5.0mm F/2.0 CS-Mount Lens for 12MP+ CS Mount Cameras like the Raspberry Pi HQ.
The CommonLands CIL05.0-F2.0-CSNOIR is a 12MP+ wide angle 5.0mm F/2.0 CS-Mount Lens for 12MP+ CS Mount Cameras.
The output image from a 12MP lens with 5.0mm focal length. Taken with the Raspberry Pi High Quality IMX477 sensor.
$59.00

Portrait 8.0mm CS Mount Lens

The CommonLands CIL08.0-F1.8-CSNOIR is a 8.0mm F/1.8 CS Mount Lens for 12MP+ CS Cameras such as the Raspberry Pi HQ Camera.
The CommonLands CIL08.0-F1.8-CSNOIR is a 8.0mm F/1.8 CS Mount Lens for 12MP+ CS Cameras such as the Raspberry Pi HQ Camera.
The CommonLands CIL08.0-F1.8-CSIR 8.0mm EFL lens is pictured with the Raspberry Pi HQ Camera.
The CommonLands CIL08.0-F1.8-CSIR 8.0mm EFL lens is pictured next to the Raspberry Pi HQ Camera.
The output from a 12MP 8.0mm CS mount lens on the Raspberry Pi High Quality Camera.
$59.00

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