Seán Duggan is a fine art photographer, author, educator and an Adobe Certified Photoshop Expert with extensive experience in both the traditional and digital darkroom. Through his writing and teaching, he has been helping photographers master digital photography and digital darkroom techniques for over 15 years. He is the co-author of Photoshop Masking & Compositing, 2nd Edition (Peachpit, 2012), Real World Digital Photography, 3rd Edition (Peachpit Press, 2010), The Creative Digital Darkroom (O’Reilly, 2008), and Photoshop Artistry(New Riders, 2006). His Lightroom Tips & Tricks column can be seen in Photoshop User magazine. He leads workshops at venues such as the Maine Media Workshops, the Santa Fe Photographic Workshops, the Palm Beach Photographic Centre, and Focus on Nature workshops in Iceland. He also offers customized training and consulting to clients in the San Francisco Bay Area and northern California, and online consulting sessions on digital photography, Photoshop, Lightroom, and digital workflow issues. His web site can be seen at www.seanduggan.com and he also posts images as well as technical tips and musings on photography, digital imaging and the creative process to his blog.