Polarised Water Drops

It's a while since I tried doing these polarised water drops (water drops on the back of a CD lit by LED light strip) and I can see why. Setting it up is easy though the angle of the light relative to the camera effects is crucial. However, discovering just how many dust particles there are in the image lead to a massive cloning exercise to tidy up the image. Note to myself to remember to get an absolutely pristine CD next time.