hi jennifer.. i just took out the lens from the mount and put it the other way round.. just place it close to the mount (touching) will do.. so you'll have one hand holding the body and the other the lens.. and manually move your body to focus... the dof can't be adjusted. your cam will have an aperture setting of f00.. cause it can't detect any lens.
* just be careful about the sensor collecting dust, since it will be electro-statically charged.. (a dust magnet)