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Gizmon introduces three clip-on lenses for the iPhone.
You may already be aware of the olloclip lens for the iPhone.
Gizmon Clip-On Lenses are similar but gives you the option to change the lens and also works with an iPad. Designed as clip-on lenses, Gizmon has introduced three new lenses for the iPhone in the form of a Fisheye, a Circular Polarizer and a 3-Image Mirage.
Each is expected to cost $35 and will clip onto your iPhone rather snugly. Read more to see the picture difference with and without Gizmon lens.
The polarizer filter can be incredibly useful in cutting out all the glare and reflections from your pictures, and it has a lot of effects, that can be applied to your camera that you can play with.