How to build your own LightField Camera for less than 10 Dollars

Would you like to convert your digital SLR into a full-fledged LightField camera? What if I told you that it costs less than 10 US-Dollars, and only takes a few minutes?

ComputationalPhoto has released a short Youtube-cip explaining how you can build your very own lightfield camera:

• Start with a medium format digital SLR with a detachable CCD back (e.g. Mamiya)
• Remove the digital back from the camera.
• Remove the infrared cut filter (IR cut) from the top of the CCD
• Place a printed cosine film mask (costs less than 10 $) on top of the sensor.
• Replace the IR cut filter, reassemble the camera, and you’re done.

The photos you’ll capture with this setup will be real light field photos, which can be used to refocus, change perspective etc. You will need special software to do that, though.
One point of information that we couldn’t find: Where can you buy a printed cosine film mask? If you know, please let us know in the comments!