Gordon McKinney's Photographic Cheat Sheet
Gordon McKinney has published a very helpful “cheat sheet” that provides a number of useful tables for any photographer who’s interested in planning ahead for prevailing light, enabling the selection of lenses, flashguns, reflectors and associated shutter speeds.
Exposure Value (EV) reference table.
Sun Altitude and Shadow Factor.
Canon Flash Guides, 580EX, 550EX, 430EX.
Nikon Flash Guides, SB-800, SB-600, SB-80DX.
Contrast ratio tables (delta EV and Aperture)
“New Rule” handheld shutter speeds, Canon & Nikon.
Update: Version v0.7 now has a Contrast Ratio Table, Support for Nikon D200 and Canon 430EX.
Update: Version v0.6 now covers the new Canon EOS 5D and Canon EOS 1D MkII N cameras.