About this Blog

Photo Writing is the web version of the Photo Writing mini-magazine produced by Limephoto and Emil von Maltitz since 2010. As of 2015 it is now completely online. Feel free to browse through the articles and please leave comments in the comments section if you would like to engage with us.

Wednesday, September 11, 2019

Confusing Circles and Airy Disks: A relatively simple explanation of depth of field and hyperfocal focusing

After much searching of the internet and reading of photographic textbooks (the dense kind that have little if any pictures) I discovered I’m absolutely clueless as to how to actually calculate hyperfocal distance and little better at understanding it. My goal then became to reverse this if at all possible. This tutorial then is my attempt to wade through what I saw as rather complex math and distil it into something that makes sense to other mathematical luddites like me. I’ll start the article with the simple stuff, and move on to the more complicated matters after.