A full spectrum converted camera is very fun. Mine is my good old Sony NEX-5n. With an IR filter, you can get pure infrared photos; just like these two weekly photos. Without an IR filter, you can get unbelievable black and white photos with huge dynamic range.
Conversion is not too difficult. I DIYed it. Just disassemble the camera, get rid of the blue IR filter in front of the sensor. That's it. I may convert my shelve setting Sony a7r some day.