I take a lot of landscape images and I'm interested in knowing if anyone has come up with a quick and not so dirty method for determining dof (near/far) relative to various focal lengths on the D5200. I'm familiar with the on-line calculators, but I don't wish to use a phone or tablet in the field to view an app. Something like a movable "compass card" giving the various combinations might work well. Or, even a 'cheat sheet' would be nice. I realize there are many factors involved such as focal length, f stop and subject distance as well as CoC factors, etc.
Just thought I'd ask, thanks in advance.