![The Martin Bailey Photography Podcast (Enhanced) show](https://d3dthqtvwic6y7.cloudfront.net/podcast-covers/000/011/213/small/martin-bailey-photography-podcast.jpg)
Summary: Here is the PDF file that contains the six diagrams I use to explain this topic: https://www.martinbaileyphotography.com/podcasts.php?dt=ti&ep=132.1#Ep132.1 You can also find the diagrams in lower resolution in this forum post: https://www.martinbaileyphotography.com/forum/viewtopic.php?p=15231 Here's a link to Mikkel Stegmann's Barnack utility that I reference so much, and mentioned in the Podcast: http://www.stegmann.dk/mikkel/barnack/ Here's the blog post from Stefan Neuweger's blog in which Stefan has kindly done a write up on the Martin Bailey Photography Podcast: http://fotos.neuweger.com/2008/04/08/podcast-showcast-mbp-podcast/