[rollei_list] Rollei CTH Christmas gift
- From: CarlosMFreaza <cmfreaza@xxxxxxxxx>
- To: rollei_list@xxxxxxxxxxxxx
- Date: Sat, 25 Dec 2010 08:21:42 -0300
In 1957 F&H Rollei developed an interesting circular tripod head for
the TLR, it was made to have a level instrument high precision and was
better from this point of view than others tripod heads using
different means like ball heads (f.e.); it had three main functions
that could be used combined or separately, one was to offer a system
for a perfect parallax correction for close-ups and
macro/microphotography similar regarding the Mamiya Paramender someway
but more complex (the Paramender is an accesory for the tripod head,
the Rollei device was a tripod head directly), the system had
different plates according the taking lens-viewing lens combo, this
lens plate slid within a frontal fixed lens plate to change from the
viewing lens to the taking lens via a lever, in other words the taking
lens was placed in the viewing lens place after it was focused (you
could do fine focusing again if necessary in the lenses new position
BTW, knowing the taking lens had the right framing), the camera also
slid on a rail smoothly for a more precise focusing with close-ups and
macro auxiliary lenses specially. Using a dedicated tripod legs, the
circular tripod head could rotate very much for reproduction work and
it could also be used to take up to 10 pano frames having the circular
tripod head a special 6º movement to help for the task. Since the TLR
could be slid on a graduated rail, you could find the very exact exit
pupil for each camera and lens combo.
The production prototype was excellent and some samples were made in
1957, but it was very expensive to manufacture, Rollei decided to
abort the project, at the end of the day the Heidosmat Rolleinars
offered a good parallax correction in general except for some slight
perspective distortion perceptible for certain situations and F&H
already manufactured the RPH from decades ago; this circular tripod
head was a good accesory Rollei did not manufacture for the market.
http://dobleobjetivo.blogspot.com/2010/12/rollei-circular-tripod-head-1957.html
Carlos
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