| http://www.w3.org/ns/prov#value | - s include: 3D guide to camera controls (iPad version) Interactive command cards that help readers navigate camera menus Instructions on Canon EOS Rebel T2i/550D set-up, fine-tuning and advanced functionality Tables, graphs and other information to help relay information such as shutter speed and exposure at a glance Instructional videos featuring David Busch In addition to David Busch's Canon EOS
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