Great little lens to have in the bottom of your Pentax Q bag. Read the forums to understand how to use this correctly.

Listed as a toy lens. That's what it is. Don't expect more.

This lens seems to defy the laws of physics and is very difficult to focus reliably. It is manual focus and needs to have focus peaking tenabled o get it to work. Can produce some amazing results, is very cheap and light. A fun lens, well worth it but expect problems with focussing.

This is a fantastic lens for the Pentax Q camera system. The fish-eye effect is exactly as you'd expect, with superb distortion effects and VERY wide angle of view. The only thing that stops me giving it a 5-star review is the focusing.

Sharp in the center and fun to use!

manual focus, fixed f/5.6, smaller than a golf ball.

I have used it for a few pics but it works very well. I plan on bringing it along for more creative photos outdoors this spring.

Great lens with awesome results... order one today!!

Lacking any distance scale, it is impossible to focus this lens in any meaningful fashion. In frustration, I actually laid out three meter sticks to see whether it was possible to get anything in focus with this lens; shooting at each of the little marks, I then compared the images and determined...

Nothing bad to say about this lens. I have no use for the "toy" lenses for the Q, but this is a must have for it. Fun and easy to use.