Mark Wallace and Profoto put together this really solid webinar on High Key and Low Key lighting techniques. It’s got some good information on how to approach creating High and Low Key, and Mark talks a bit about the difference between High and Low Key portraiture, and what each one can do for you. Quoting from the Profoto blog:
As mentioned when the webinar was accounced, high-key lighting is great for getting a fresh, fun and upbeat feel to an image. Low-key lighting, on other hand, is great for creating drama and for accentuating the contours of your subject. Knowing your way around these two lighting styles is fundamental for any photographer wanting to create different images with many different feels to them. And that you will after watching this video!
It’s an hour long, but there’s some good basic information in there and a few techniques I’d never seen before, such as gobo-ing a background pattern by slashing at some cinefoil. That’s something that I’m definitely going to have to try sometime here soon.