intermediate

In a forum thread somewhere, somebody asked about resolution in distant focus and that tickled me into writing this article on the influence of the environment on long tele work. I have taken several pictures of distant blobs at long focal lengths, so clearly I am the undisputed expert and my words should be taken as gospel (and if you believe that, I have several renowned landmarks for immediate sale as well).

Disclaimer: I'm not a scientist. Also, some of the science in this post has been simplified.

Update: Phase 2 concluded. During testing for phase 2 it became clear that the original tests for the eneloops was faulty, and that test has been redone, yielding radically different results.

When you take a picture, the camera stores a lot of settings in the image file. This information, called the EXIF data can be retrieved by most of the better image viewers (and some browser plug ins) but only a few of these show all the information. This article will look at some of the more useful bits of information that you may not know you have. To do so we'll use exiftool, a freeware exif reader that shows almost all the exif tags there are.