Bob DiNatale is an Adobe Certified Photoshop Lightroom Expert and an X-rite Coloratti. - Author of "The Optimum Digital Exposure" - US Patent in Color Printing; - Polaroid R&D - worked in experimental silver emulsions and optical sensitizing dyes - Instructor for both Nikon and Time Life Schools of Photography - founded the Olympus School of Digital Photography. - Photographer & Lecturer - specializing in 1-on-1 online training in all aspects of digital photography.