Photography Cheat Sheet: what your camera captures at every lens' focal length
Focal length comparison
Fundamentals of Macro Photography
Focal Length Comparison Lens Selection
How your lens will capture your portraits. anything above 50mm is best for portraiture.
focal length cheat sheet
A break down of which lens to use for which photo subject, by Michael Bullock for Camille Styles
What is Depth of Field? How aperture, focal length and focus control what's sharp | Digital Camera World
Chart of how slow of a shutter speed you can use at each focal length.
Depth of Field: it's more than just aperture | Boost Your Photography