If you’re into photography, you would know what crop factor means. I have a Nikon D90 camera with a crop factor of 1.5. For example, if you use a 24mm full frame lens on a D90, the focal length will be 36mm. So, here’s a handy bash script that calculates the crop factor by multiplying the full frame focal length by 1.5.
#!/bin/bash if [ $# -eq 0 ] then echo "Usage: cropfactor.sh 24" exit fi a=$(echo "1.5 * $1" | bc) echo "Cropfactor focal length is: " $a"mm."
ulysses@penguin:~/Code$ ./cropfactor.sh 24 Cropfactor focal length is: 36.0mm.