Lens hoods help give you better pictures by reducing flare caused by nonimageforming light. If you are looking for a lens hood for your SLR or digital camera, or you'd like to try a lens hood out to see how much it improves your photos, you should check this site out: http://www.lenshoods.co.uk/

They offer lens hoods that you make yourself. Basically, they are PDF files that you print out and fold together following the instructions and lines on the printed sheet. Each lens hood is designed for a specific camera or lens so that they fit perfectly. Unlike lens hoods you buy, these are very portable, and even better, they are free. They have lens hoods for almost every popular camera/lens including Canon, Olympus, Nikon, Pentax, Sigma, Tamron, Tokina, and more.