This project came about when I had noticed some scraps of colored cellophane lying around the house. I was intrigued to see if i could use them in a camera filter, and eventually ended up with a reversible purple & blue filter that slides over the camera. This filter can quickly change the temperature in any photo, and applies an interesting grainy effect. I also noticed that this filter reacts much more dynamically to changes in light and exposure than a digital filter, which can help create some interesting pictures.
Note- this is my first instructable, so any support is greatly appreciated!