Freelensing is a technique where you detach the lens from your SLR and shoot with it tilted, providing similar effects to what you get with a LensBaby, but with the lenses you already have.
Design blogger Tina Roth Eisenberg (Swiss Miss) explains this easy but really compelling technique:
Freelensing means you take photos 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.
With vintage-style photos becoming a popular trend with mobile phone cameras, this is a neat trick to get the effect the old-fashioned way. So what does it look like? I recorded some video while freelensing to take a peek into my DSLR's sensor during the process:
Freelensing is a fun way to get some neat focus effects, but because your lenses are meant to be mounted to your camera, you run the risk of letting in dust. Fortunately, most cameras have sensor cleaning functions that work pretty well, but definitely keep dust in mind when giving freelensing a try.
Freelensing [Swiss Miss]