I read in the Rollei Technical Report that a lubricated new or well serviced Compur shutter used for the Rollei TLR cameras could be released 30,000 times before a shutter failure, if the shutter is used regularly. According this book, the main problem with lubricated mechanical shutters like the Compur is that the lubricant attracts dirt, if the shutter is not used regularly the lubricant evaporates remaining the dirt causing some of the problems we know. This is the reason serious collectors and shutters and cameras manufacturers maintain the shutter free of lubricants for storage to avoid these problems. A Compur shutter without lubricant could be released 5,000 times before a shutter failure and this is the best way to keep a mechanical shutter if the shutter is used scarcely, it would be the case for collectors or photographers using his cameras once or twice times per year. An electronic focal plane metal shutter like the used for the Canon Eos 1v can be released 120,000 times before a shutter failure, but this isa differnet shutter type.- 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