I have uploaded nearly 50 images of writers, editors, artists and publishers, taken at various conventions over the years, to my Flickr gallery — click here to take a peak. I will be adding further photos when time allows.
I have always preferred black and white photography for portraiture — it reduces distracting colours, especially those in the background, and, I believe, allows the personality to show through.
The above photo is of the late and very great Tanith Lee. I took this at an Eastercon a few years back.