2011/8/18 Don Williams <dwilli10@xxxxxxx>: > At 10:01 AM 8/18/2011, Alan wrote, in part: > I remember something about a glass accessory plate for the Rollei. Did that > go in front of or behind the film? > > My recollection is that it went in front because I had some concerns about > scratching the film. Never saw one, though. Most Rolleiflex TLR cameras (except the T) made from 1960 to 1966 were prepared to receive a glass plate or "Planglass" to assure film flatness when film was in the film plane position, the glass was placed in front of the film and it required a dedicated camera back with a third position for the film pressure plate. Some tests demonstrated there was no significant or visible image quality improvement even for big enlargements sizes, the glass use had problems with dust and humidity and fingers marks recquiring often cleaning and then Rollei no longer manufactured it from 1966. The Rollei SL 66 "bible" advises -if possible- to advance the film only a few seconds before to shoot the camera, this way the film paper back has no time to modify the film flatness on the film plane. The 220 film has no paper back and then it avoids this problem. Some Carl Zeiss tests showed a significant sharpness difference for 120 and 220 film (220 film was better) due to the 120 film paper back action on the film strip. 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