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.
Freelensing can also:
- Give extra bokeh by shrinking the area in focus (aperture is 0)
- Allow for super macro shots
- Produce ethereal lighting by allowing stray light to get in to the sensor
- Make delicious light leaks
- Create tilt-shift effects