So I presume that an RB Mamiya should be stored cocked too? I stored it for a number of years, and its without a problem I might add. Nobody ever told me to store it cocked, unless its different to a hasselblad in that regard. So I was probably doing the wrong thing?
I like this site, I pick up little bits of information here and there.
Cocked or un-cocked doesn't really matter with any shutter as the spring is in tension in either case. i.e. it is still in tension when un-cocked as the mechanism only uses a small portion of the spring's movement to actuate.
As most camera systems need the lenses to be cocked for removal and re-mounting, it seems logical to keep them cocked.
"People who say things won't work are a dime a dozen. People who figure out how to make things work are worth a fortune" - Dave Rat.
Nope, no hint is given. I guess it might be more than a month or longer... But I have a 110/2.8 which was stored about 10 years cocked and it works perfect. Its shutter tension is very, very soft compared to uncocked stored lenses but as said, it works perfect.
In normal use, the shutters in the Mamiya RB/RZ lenses are intended to be left tensioned between uses, so the suggestion to release the tension for long term storage is interesting, and clearly differentiated from the "norm".
“Photography is a complex and fluid medium, and its many factors are not applied in simple sequence. Rather, the process may be likened to the art of the juggler in keeping many balls in the air at one time!”
Ansel Adams, from the introduction to The Negative - The New Ansel Adams Photography Series / Book 2
I had a similar this discussion with Hasselblad's optical engineer. For reference his initials were E. P. It is not appropriate to supply his name. He was responsible for the glass and mechanical lens parts. He recommended low humidity to avoid growth <35%. The shutter should be stored uncocked since this puts less stress on the main spring. If removed from the camera use a coin to slow down the unwinding of the shutter mechanism. (Hold a coin in the slot then trip the lens by pushing the protected release on the back of the lens.) Store at 1 second since this is also a less stressed position.
To keep the shutter parts lubricated, activate the lens at least once a year at a variety of speeds. Also, rotate the focusing ring through the range. Storing at a variety of orientations keeps the lubricate from building up in one place.
To reinstall on the camera body, carefully wind the lens with the coin. Be careful not to let the coin slip.
The camera leaves the lens cocked in order to provide a user feature. The lenses can standup to this use but it may not be ideal for long term storage.
It is still best to use it!
Last edited by laser; 01-01-2012 at 09:48 PM. Click to view previous post history.