These are the Hasselblad cameras used by NASA beyond the initial hype in the text, the first one to be used was a 500C that the astronaut Walter Schirra bought in Houston, Texas, NASA simplified this camera very much. Most of these cameras were modified and simplified, the improvements came from the electric motors and some electronic functions. There is a link for an interesting "NASA Astronaut's photography manual": http://www.hasselblad.com/about-hasselblad/hasselblad-in-space/space-cameras.aspx Carlos --- Rollei List - Post to rollei_list@xxxxxxxxxxxxx - Subscribe at rollei_list-request@xxxxxxxxxxxxx with 'subscribe' in the subject field OR by logging into www.freelists.org - Unsubscribe at rollei_list-request@xxxxxxxxxxxxx with 'unsubscribe' in the subject field OR by logging into www.freelists.org - Online, searchable archives are available at //www.freelists.org/archives/rollei_list