The Rolleiflex 2.8 (2.8A) with the Compur X CR0 and the Rolleiflex 3.5X
manufactured from the ending of 1949 did not have the B retaining function
for the shutter release lock. Some 2,8A units manufactured with the Compur
Rapid MX CR0 in 1951 and the Rolleiflex 3,5A or MX manufactured with the
Compur Rapid MX CR00 from 1951 had this function for the lock (checked in
the 3.5 MX manual). The feature started in 1951 with the Compur Rapid MX
shutters.
My 1954 2,8C has the B retaining function for the lock. I don't use it
often, but I did it for this photograph about stars trace; I was in the
middle of the countryside, the 2,8C was my only camera and I needed to use
the Rolleikin because there was35mm film at the nearest town. The exposure
was close to 1 hour, I did not have cable release (I'd use the lock anyway,
because a cable release hanging from the camera for that time could cause
some camera movement due to the wind) and turned the lock at B:
https://www.flickr.com/photos/itarfoto/2242614028/in/dateposted-public/
Carlos
2016-10-23 22:23 GMT-03:00 `Richard Knoppow <dickburk@xxxxxxxxxxxxx>:
I think my camera dated to around 1948, I looked up the date but don't
remember it. The shutter button is the old thin kind. The shield that
rotates up seems to be there to prevent accidental exposures. This one has
the cable release socket on the lower right front (facing the camera). It
does not have flash synch.
My later MX, about 1954, has the shutter button that is threaded to take
a Compur type release but is also threaded on the outside to take a Leica
cable release. This has a shield that will catch the threads and hold the
shutter open. It also serves to hold the shutter button from moving when
the cable release is used.
On 10/23/2016 5:06 PM, CarlosMFreaza wrote:
Yes Richard, the Rolleiflex 3,5A or 3.5MX from 1951 had this feature, it
seems it was the first Rolleiflex Automat to have it.
Carlos
2016-10-23 19:04 GMT-03:00 `Richard Knoppow <dickburk@xxxxxxxxxxxxx>:
The lock also made time exposures possible on cameras with only a B
setting. Not all cameras with a protective cover on the shutter tripper
will lock it in B, for instance my just post war Rollei Automat. That needs
a locking cable release.
On 10/23/2016 2:31 PM, Cmfreaza wrote:
I forgot to mention an additional function for several Rolleiflex TLR
models and SL66 shutter release locker rings: Pressing the shutter release
button at B and turning the locker ring, the shutter will be open up to you
turn the locker again, this way you can keep the shutter open for ever.
Jan could use this function if the tripod was good.
Carlos
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Richard Knoppowdickburk@xxxxxxxxxxxxx
WB6KBL
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Richard Knoppowdickburk@xxxxxxxxxxxxx
WB6KBL
