Century Optics is behind the iPro Lens system.. and this is where it is getting interesting, unlike the regular run of the mill iphone add-on lenses, Century optics make add-on lenses for broad-cast camers.. this is the folks who provide fisheye views to movie-makers... in other words, somebody with a lot of lens-making experience is taking your iPhone serious. and why should they not.. the iPhone 4 and 4s are both great personal video cameras, the 4s have a stabilized camera image even.
There are two lenses in this kit.
a fisheye lens for really wide shots with barrel distortion.
a wideangle - which fairly closely emulate a 35mm fov
Both lenses are the best optical lenses I have ever tried on my phone. nothing more to say about the lens quality.
So are these worth it..?
the simple answer is a unqualified YES. There is no better add-on lens available for the iPhone.
The longer answer is about the same.
The lenses feature a bayonet mount which permit a quick change between the fisheye and regular wide lens. the bayonet mount the lens far firmer than the typical magnet ring systems.
Love the rock-solid storage cylinder for the lenses. the lenses mount into a bayonet in the storage handle and is secure from scratches when stored.
Only thing Im not entirely keen on is the iPhone case.. two things: first its a pain to get on and off the phone.. and second, I have a steadycam-smootee for the iPhone and to use with this case I had to cut the case in two.. now the case slide in from the top of the phone and still stay firmly in place and I can mount the smootee for stable moving shots.
* OK one more nick on the case.. seriously why not put a 1/4 20 tread for a tripod straight on the case instead of a mini thread with a screw in adapter for the tripod.? just saying.
As for the case being hard to install and remove, for a lot of people who intend to leave it on the phone, it's no big deal. *note you can install the handle and use it to pry the side of the case open then push the phone out through the hole in the backside of the case.
* I do have the Olloclip for the iPhone also, and while it is a great thing and smaller overall, the quality of the glass and optics is simply not the same as the iPro.
*ironically one reviewer, comparing the olloclip and the iPro complained about the shadows in a iPro shot was too dark.. that is a result of great glass, add on lenses with less contrast have more scattered light and therefore less contrast.
Ultimately - the verdict is HIGHLY RECOMMENDED..!