This is a nice Rolleidoscop, if you put the camera vertical in your mind, the design relativeness with the Rolleiflex TLR is evident. Gustav Bethman, a very young technician, received instructions from R Heidecke to "short" a Rolleidoscop and then the Rolleidoscop right chamber was removed, this first TLR prototype was enough to convince Paul Franke that a compact and cheap TLR camera could be developed. After the demonstration for his partner, Heidecke noticed that it was much more easy to handle the prototype vertically and then a lot of work, new tools and money was invested to adapt the shortened Rolleidiscop to two vertical chambers, one for the viewfinder and other for the film with vertical film advance. For years the Heidoscop and Rolleidoscop users used them as normal camera capping one lens, after the other and advancing the film after these two shots, this way to use the stereo cameras was the compact TLR design origin: http://auction-team.de/new_highlights/2006_09/ph/074.html All the best Carlos __________________________________________________ Preguntá. Respondé. Descubrí. Todo lo que querías saber, y lo que ni imaginabas, está en Yahoo! Respuestas (Beta). ¡Probalo ya! http://www.yahoo.com.ar/respuestas --- 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