Focal Length Statistics
When thinking about buying a new prime or zoom lens for your DSLR, it is good to know some statistics of the photos you have taken in the past. In this article, we will create a histogram of the focal lengths of all pictures. The method was tested on Linux. It might work on Mac OS X and Windows (maybe using Cygwin) as well. First, let’s create a CSV file containing information about the camera model, lens and focal length of each picture. You can add arbitrary EXIF information in this step (see man page of exiftool). ...