photography tutorial collection

http://photoinf.com/General/Robert_Berdan/Composition_and_the_Elements_of_Visual_Design.htm

http://www.kenrockwell.com/tech.htm

Nikon D90 video:

http://www.nikondigitutor.com/eng/d90/index.shtml

http://www.capturenx.com/en/lessons/color/index.html

http://chsvimg.nikon.com/products/imaging/lineup/d90/en/index.html

Photography tutorial

http://www.photoxels.com/digital-photography-tutorials.html

http://www.geofflawrence.com/photography_tutorials.htm

http://www.cambridgeincolour.com/tutorials.htm

http://www.dptutorial.com/