Personal Lighting Systems by Dean Collins PDF

[photon]

Light weight modular diffusion lighting systems you can build yourself from everyday materials e.g. PVC tubing. The late Dean Collins was a lighting guru and this free download (3.76MB PDF) is from the site that sells training DVDs by him and others. Some of the designs in this booklet were put into production by Manfrotto, though made from metal tubing and castings.

http://www.software-cinema.com/tinkertubes/tt-book.pdf