Earlier my colleague Steve wrote about the US$249 Photojojo iPhone Lens Dial, an iPhone accessory that gives iPhone photographers access to an array of three camera lenses on rotating dial. For those of you who like the ability to add lenses to your iPhone, but don't like the $249 price, I recommend the Olloclip, a $69 slip on 3-in-1 lens for the iPhone 4 and iPhone 4S.
The Olloclip started off as a Kickstarter project and went on sale in May. The body of the Olloclip is made of anodized aircraft grade aluminum and it comes in two colors, red or black. On the front end of the Olloclip is the fish eye lens, which gives you a 180-degree field of view. The rear of the Olloclip houses the wide angle lens, which gives you a greater field of view than what your iPhone 4/4S camera would normally have. You can unscrew the wide angle lens to access the macro lens that gives you about ten times the magnification of the subject of your shot within 12-15mm.
To use the Olloclip, simply slip it onto the end of your iPhone, over the iPhone's camera. The notch in the Olloclip is made of plastic so you don't need to worry about it scratching the glass front or back of your iPhone 4 and 4S. The Olloclip's entire 3-in-1 lens solution is quite small, which is nice when traveling. It easily fits into your pants or shirt pocket. The Olloclip also comes with a small, draw-string bag/case made of microfiber material that also doubles as a lens cleaner.
The Olloclip's primary difference from the pricier Photojojo iPhone Lens Dial is that it comes with a macro lens instead of a telephoto lens. However, if macro shots are more important to you than telephoto shots, the Olloclip is a terrific choice for photographers who want to get more out of their iPhone4/4S camera. The quality of its construction, size, and features can't be beat for the price. You can order the Olloclip from Amazon or directly from the company's website.