A Simple Explanation of How Crop Factor Works

If you're just starting out in photography, you may be confused with the term "crop factor" that's thrown around when talking about cameras and lenses. Here's a 10-minute video in which Mark Ryan Sallee of Michromatic explains the concept in an easy-to-understand way.

A Mathematical Look at Focal Length and Crop Factor

I'm hoping this post can explain a lot of the confusion beginning photographers have about focal length and crop factors. Some understanding of basic geometry is required for you to fully grasp this post. Also note that I'll be rounding the math decently well. Just run through the calculations if you want exact answers.