Photos taken with the lens detached from the camera but held in place and moved around to focus. This also lets extra light in sometimes causing light leaks and giving a vintage look and feel.

Also:
* Gives extra bokeh by shrinking the area in focus (apeture is 0)
* Allows for super macro shots
* Delicious light leaks
* Tilt-shift effects

Flickr member lukeroberts coins the term freelensing. People have probably been doing this for some time but I’ve only come across it just recently. Some dslrs won’t allow you to take a photo without a lens mounted on the camera. I’m not sure if there’s a way to force the camera to take a photo. This technique only works well with a prime lens. You’ll have to focus the lens to infinity and experiment with your distance to subject and the len’s distance and angle from the camera. You can probably expect dust to get on your sensor so make sure you can clean it. My only prime lens is an 85mm f1.8 and the following are some examples. I wonder what other lenses can be used.