| Chicago Area Camera Club Association | www.chicameraclubs.org |
| Photographic Society of America | www.psa-photo.org |
| Professional Photographers of America | www.ppa.com |
| Fox Valley Camera Club | www.foxvalleycameraclub.com |
| Agfa U. S. | www.agfausa.com |
| Ilford | www.ilford.com |
| Olympus USA | www.olympusamerica.com |
| B & H Photo | www.bhvideo.com |
| Kodak | www.kodak.com |
| Pentax Camera | www.pentax.com |
| Bogen Photo | www.bogenphoto.com |
| Konica | www.konica.com |
| Singh-Ray Filters | www.singh-ray.com |
| Calumet Photo | www.calumetphoto.com |
| Kyocera - Yashica - Contax | www.kycera.com |
| Tiffen Filters | www.tiffen.com |
| Canon USA | www.usa.canon.com |
| Leica Camera USA | www.leica-camera.com/usa |
| Tocad Tripods (Sunpak-Slik) | www.tocad.com |
| Canon Camera Museum | www.canon.com/camera-museum |
| Minolta USA | www.minoltausa.com |
| Fuji Film USA | www.fujifilm.com |
| Nikon USA | www.nikonusa.com |
| George Lepp and Associates | www.leppphoto.com |
| Photo.net | www.photo.net |
| Photoquest | www.photoquest.com |
| Shutterbug | www.shutterbug.net |
| Photo zone | www.photozone.de |
| Nature.net | www.nature.net |