Digital Optics 2x Adapter (58mm) brand_Maiko but this is a very

but this is a very nice little travel unit that's well worth a look

and spot/Matrix metering

This awkwardly-named device is a Holga DSLR lens with its focusing mechanism removed and a frankly kind of sweet special-effects filter system attached instead

Use it for lenses

If you're curious about dabbling in macro work

Digital Optics 2x Adapter (58mm) brand_Maiko but this is a veryThis Digital Optics 2x conversion lens screws into a 58mm lens thread and provides a bit of a telephoto boost. Image quality is decent, though you're not going to mistake this for a real telephoto lens. Despite the name, there's nothing digital about this lens, so you're free to use it on a film camera if you want.