Ellen Anon is an accomplished photographer—her photos have been showcased in calendars, posters, galleries, magazines, and books, including Sierra Club's Mother Earth. Ellen teaches photography and Photoshop workshops for nature photographers around the country.

Tim Grey writes about digital photography for Digital Photo Pro, Outdoor Photographer, and PC Photo magazines. He is the author of Photoshop CS2 Workflow, Color Confidence, and co-author of Photo Finish, all from Sybex. Tim is also a popular speaker at seminars and trade shows. In his almost-daily "Digital Darkroom Questions" (DDQ) e-mail service, he answers questions from photography enthusiasts and pros.