There's a multitude of emulsions available, even after a lot of them have been discontinued. Each one reacts a little differently to light, both in terms of requiring more or less light, but also in terms of reacting in various unique ways to light.
Another Kodak film discontinuation notice
A Kodak letter got scanned and passed around the Internet and it looks like another emulsion is gone -- Ektachrome 400X this time. They make some pains to explain that families of film other than 400X are not actually dead in the letter.
How to crossprocess, a beginner's guide
While there's still ample availability of cameras, film, and people to develop it, everybody should give crossprocessing a shot at least once! I've written about it before; it's a great way to force yourself to not shoot completely realistic pictures.
Candlestick Point and Hunters Point
Candlestick point, the 101, Bayview, and the old Hunters Point naval shipyard, in a stitched panorama.
Elea
A headshot of Elea
Vulnerability and power
Jinx1313 looking up at the camera
Ektachrome 400X
A long exposure Ektachrome 400X night shot.