Seán Duggan is a fine art photographer, author, and educator with extensive experience in both the traditional and digital darkroom. He is a co-author of Photoshop Masking & Compositing (2nd Edition, 2012), Real World Digital Photography (3rd Edition, 2010 / 2nd Edition, 2003), The Creative Digital Darkroom (2008), Photoshop Artistry (2006), and his Lightroom Tips & Tricks column can be seen regularly in Photoshop User magazine. Through his writing and teaching, he has been helping photographers master digital photography and digital darkroom techniques since 1996. He is on the faculty of the School of Visual Arts in New York City, presents online courses on photography and digital processing for, and he leads workshops and seminars at venues across the country.