| lifehack.com | The Ultimate Photography Cheat Sheet
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| photographylife.com | Focul length (e.g. 50 mm)
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| photographylife.com | Aperture is like the pupil, which can open and close to change the light that passes through
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| techradar.com | Canon DSLR tips and tricks |
| youtube.com | Quick canon 600d tutorial |
| davemorrowphotography.com | Shutter Speed Guide
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