19. Better Photos
    Teaches photographers how to make better photos; tips to improve photographic technique, camera comparisons
    http: //betterphoto.com/
    
    
20. Basic Photography
    This course provides basic instruction on the following subjects: the principles associated with light, optics, cameras, light-sensitive materials, equipment, still and motion-media shooting techniques, chemical mixing, image processing and printing, job control, and photographic finishing
    http: //dofmaster.com/courses/basic/index.html
    
    
21. How Photographic Film Works
    What does it really mean when you "take" a picture with a camera?
    http: //howstuffworks.com/film.htm
    
    

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