An increasing number of travellers have begun relying on iPhone cameras as their primary point-and-shoots.

It’s easy to understand with the proliferation of photo apps, the increasingly better quality of the shots and compact size of the phones.

But there are some shots that the iPhone camera isn't made to capture. That Technicolor Amazonian bug will turn out like a blur. That celeb sighting across the restaurant? Your iPhone can't zoom that far. And there's no app for that. But there are a number of external lenses that you can stick or screw onto your iPhone to make those shots possible. We took four lenses – a wide angle, macro, fisheye and telephoto – from Photojojo for a test drive on a dreary, rainy day in New York. Check out this gallery to see the results.