What is F-Stop and Why is the F-Number of the Lens So Important for Thermal Infrared Cameras?
By A Mystery Man Writer
Description
An f‑number (ƒ/#) or f‑stop refers to the ratio of a lens’s focal length to its aperture’s diameter (lens opening vs focal length) and indicates the amount of IR energy (heat) coming through the lens to the infrared sensor. The lower the f-number the larger the aperture diameter, meaning more thermal IR energy is reaching the infrared sensor.
![What is F-Stop and Why is the F-Number of the Lens So Important for Thermal Infrared Cameras?](https://www.optris.com/wp-content/uploads/2022/08/ir-camera-optris-pi-1m.jpg)
PI 1M: IR cameras for the metal industry - Optris
![What is F-Stop and Why is the F-Number of the Lens So Important for Thermal Infrared Cameras?](https://media.springernature.com/full/springer-static/image/art%3A10.1038%2Fs41598-022-11616-8/MediaObjects/41598_2022_11616_Fig1_HTML.png)
Active thermo-reflectometry for absolute temperature measurement
![What is F-Stop and Why is the F-Number of the Lens So Important for Thermal Infrared Cameras?](https://upload.wikimedia.org/wikipedia/commons/0/0c/Infrared_dog.jpg)
Thermographic camera - Wikipedia
![What is F-Stop and Why is the F-Number of the Lens So Important for Thermal Infrared Cameras?](https://media.macphun.com/img/uploads/macphun/blog/2120/robert-shunev-mS1nlYbq1kA-unsplash.jpg)
Understanding F-Stops: What is an F-Stop and How to Use It
![What is F-Stop and Why is the F-Number of the Lens So Important for Thermal Infrared Cameras?](https://cdn.shopify.com/s/files/1/0150/2930/files/Thermal-camera-resolution.jpg?v=1610929090)
Complete Guide to Infrared Imaging & Thermal Cameras
![What is F-Stop and Why is the F-Number of the Lens So Important for Thermal Infrared Cameras?](https://www.zdnet.com/a/img/resize/6d6d18dd8cb2af948d56f0b090cb47dbfc3acee0/2023/12/09/98462a3a-b730-43c2-a4b1-bf5095e5e93c/img-6890.jpg?auto=webp&width=1280)
I tested the world's first thermal phone camera with a 50Hz
from
per adult (price varies by group size)