International Association of Panoramic Photographers
The International Association of Panoramic Photographers (IAPP) first met in April of 1984. IAPP is an affiliate of the Professional Photographers of America, headquartered in Boca Raton, Florida. Membership in the Association is comprised of amateur and professional photographers. Members are from the motion picture industry, NASA, computer sciences, journalism, art and commercial photography. Association members give technical assistance, share information about business opportunities, stock agency requirements, color printing techniques, and more.
I've been using Koh-I-Noor Rapidograph Technical Pens since 1969. My aunt bought me my first set when I was 12 and I have used them daily ever since. I love the fact that I can mix my ink colors to match my watercolor or my wardrobe and use "Pelikan Drawing Ink A" almost exclusively. Though the inks made by Koh-I-Noor and Winsor Newton are satisfactory.
If you are a beginner, I would NOT recommend purchasing anything smaller than an 0 (0.35 mm). Even as a professional I find cleaning a 4x0 to be a challenge. I work most often with a 2x0, and find them to produce the smoothest flow, if kept clean.