Labs

This site is a collection of tutorials for beginners and experienced photographers. It originally had a 35mm emphasis, but many of the fundamentals apply to any form of photography.

The main sections are divided into sub-categories. Technique, for example, includes 11 topics such as light, composition, night photography and darkroom techniques. There's also an extensive glossary, a forum and a gallery.

Although PhotographyTips was originally free, if you want access to the site in its entirety you now have to pay a monthly subscription of US $4.95 (around £2.80). However, if you choose not to become a member there's still plenty of interesting and useful information available to all.