A couple of years back, Lomography started selling Diana F+ adapters for Canon and Nikon digital SLRs for use with its inexpensive plastic lenses, effectively turning your high-end digital SLR into a toy camera. But why stop with just one manufacturer of plastic lenses?
Those of you who want to experiment with another lo-fi photography option (you know, beyond using software to reproduce the effects), should check out Holga Direct's line of lenses--especially if you have an interchangeable lens camera.
Though the site carries lens sets for Nikon, Canon, Olympus, Sony, and Pentax SLRs, it also has kits for Olympus PEN, Panasonic Lumix G, Samsung NX, and Sony NEX ILCs.
A single lens will only set you back $24.99, while its Kitchen Sink set comes in at just $108.99.