In a summary  HERE  I described an artefact as the distortion of an image.  There are various environmental, optical and processing paramet...

I was recently asked if it there might be software available that would restore perfect white balance to jpegs of birds captured in the han...

General Principles While I have researched and written about lots of complex aspects in the realm of light, up until now I have avoi...

In this Birding Frontiers posting the late, and sadly missed Martin Garner  describes a phenomenon often attributed to Siberian Chiffchaf...

In the spirit of the season I recently had a close encounter with a ghost.  A very washed out Western Bonelli's Warbler Phylloscopus bo...