Last week i bought a cool tool from a friend who was selling his iPhone 4s. It is the Olloclip!
It is a easy mountable device that gives u 3 lenses. Fisheye, wide angle and micro lens.

Cons:
- Cant use it with a iPhone case
- With a thick screen protector, it goes on more difficult.
- If you have a back skin it might damage the skin.

Pros:
- Complete product
- Quality surprisingly good
- Small and easy to carry
- Very easy to operate
- Clicks on very strong.

Some pictures i made to show the difference:

Package and Olloclip:

Normal picture taken with the iphone 4:

Picture with the wide angle lens:

Picture with the fisheye lens

Picture taken with the Micro lens