there is also a fisheye and telephoto magnetic lens, but i don't really like them
this is the link to
photojojo's page for these lenses
important to read the FAQ
Q:
Will these lenses fit on my phone?
A: Sure! These lenses really work with most phones. If the area around your camera lens is relatively flat, and you can stick the little metal ring to it, our new camera phone lenses will work on your phone, no problem!
Q:
What about my super flashtastic iPhone 4?
A: Well, we tested the lens on an iPhone 4 and it works fine but not perfectly. The ring fits the phone, but it does cover the flash, and because of that super slick glass the stickiness of the ring isn't so super.
For best results on the iPhone 4, we recommend you use a case that covers the back of your phone, and stick the ring to the case. In addition, many of our customers have cut a notch in their ring with household scissors to expose the flash. A few minor hacks.
Q:
What about my iPhone 3G/S? The back is kind of curved - will the lenses still work?
A: The lenses will work with the iPhone 3G/S - again not perfectly. The curve of the phone will cause the edge of the fisheye and wide angle lens to be seen in your photos. The macro lens won't have this issue. You can easily crop the edge of the lens out of your photos with your favorite photo-editing program! Photoshop app, ftw.
Q:
Can I use these lenses with a case on my phone?
A: You totally can! As long as the case is tight against the phone it should be fine. Thicker cases may cause slight light leaks but it'll still work!
Q:
What is the size of that little ring?
A: The diameters of the ring are 13.06mm (outer) and 9.38mm (inner). If your phone's lens has a smaller diameter, it'll work great!
Q:
Whats with that big black circle around the Telephoto and Fisheye shots?
A: Since these lenses are actually adapters you'll see part of the lens (or vignetting) around your photos. Nothing a bit of cropping can't fix! Plus, we think it looks kinda cool and secret agent-y.