A popular resource for learning to use your flash, David Hobby does a great job explaining light through case studies based on his work as a photojournalist.

A course offering a structured, comprehensive path to help you understand the basics of aperture, shutter speed, ISO and more. Build your confidence shooting in manual mode.

Peak inside the camera bag of talented photographers from around the world!

A primer focusing on the ever dynamic speedlite. Syl Arena's enthusiasm for photography and light makes this a fun and interesting read. 

If you're nervous about your upcoming lens purchase, use their camera and lens comparison resources to see exactly how sharp it is or isn't.