![Crop Factor Basics](https://images.squarespace-cdn.com/content/v1/5882f245db29d6b295c2b5a8/1501151601200-MEDBNJXBIJR7R57TFCIN/banner.jpg)
Crop Factor Basics
The first thing to know in the pursuit of crop factor enlightenment is that the entire system is based, rather arbitrarily, on the old 35 mm film standard. I say “arbitrarily” because a crop factor is simply a ratio, one that can just as easily be calculated using an 8" × 10" large-format camera or the tiny iPhone 7 camera as a reference.