Freelensing

Because of the increase in flange focal distance, this technique is most successful with closeup or macro photography, where infinity focus is not essential.

One of the by-products of freelensing is the introduction of "light leaks" which can be controlled to some degree and produce toy-camera like effects similar to those achieved with a Holga or Diana camera.

The process is facilitated by use of an SLR, DSLR or MILC, in which the focus, and to a lesser degree the composition of the image, can be previewed prior to capture.

Freelensing is best accomplished in a relatively dry, dust-free environment due to exposure of the mirror box, and the dust-attracting sensor, to the elements.

Once the photos have been captured, the lens should be remounted or a body cap installed to protect the mirror and sensor from dust or moisture.