Amazon.com description: Product Description: Photography is all about light. Canon Speedlites give you the next best thing to cumbersome studio lighting wireless flash units that you can actually pack in your camera bag and take along. Tuck this full color book in there, too. It will help you maximize the effectiveness of your Speedlites and help you create professional lighting effects in more than a dozen unique settings. With this "Digital Field Guide" you'll: Learn all your Speedlite's settings and how to use E TTL metering. Experiment with bounce flash, fill flash, and using multiple flash units. Set up a portable wireless studio with backgrounds, umbrellas, and soft boxes. You camn use "Speedlites" to light professional quality shots ranging from studio portraits to concerts to product photography. You can explore exposure, lens choices, and lighting for outdoor portraits, still lifes, and much more.