iphone telephoto lens - I have tried to make this lens work. But it sucks. Save your money. Perhaps I should create a page called "Video Tools that Don't Really Work". This would be entry number one.
The Canon XF100 is the best small-form professional video camera out there right now. It captures video to Compact Flash cards, creates MXF files and has a very nice sensor. $3000 is not cheap. But this is a solid profesional camera at a pro-sumer price.
Sony creates a video camera with interchangeable lenses. this HD Handycam camcorder is aimed directly at the DSLR crowd, but with better audio integration. Sony has priced the camera at $2,198 and the camera can leverage either Sony or Minolta lenses.
I live for this lens set on my phone. I love using it and I love the flexibility it gives me when I am out. I put the lenses in an Altoid tin to make them easy to carry. Just drop them in my back pocket. The Photojojo Phone Lens Series - Pro quality Fisheye, Telephoto, Wide Angle and Macro cell phone lenses. ($49.00, photojojo.com/store)