Re: more 70mm!

["Willem-Jan Markerink" <w.j.markerink@xxxxx>]

On  9 Jul 97 at 9:12, Tom Kline wrote:

> Other than that, the same formatting is possible as with 120/220: a
> 45mm long piece of film is used for the Bronica and Pentax 645
> cameras, a (nearly) 70mm long piece of film is used for Mamiya RB,
> and a 60mm piece is used for Rollei 600x (odd, hardly known detail:
> the Rollei backs use Mamiya internals!)
> 
> You have been reading the Rollei list info from Bob S!

Ha, no way! 
Bob couldn't even tell me much about the 70mm TLR cameras he 
mentioned recently....must have been before his time.

But the story about these 600x backs has been pilfered from a genuine 
German rep at Rollei, by yours truely.
It got him going after mentioning that had researched the RB backs
in vain, as Mamiya Holland simply said 'out of production', and
Mamiya Germany said they hadn't ordered one in 5 or more years. 
My direct question at Rollei was whether I could have 70mm backs
made for the 66 series, which was (and is) much more appealing to me
than any other system (apart from the square size that is).
He then said that it was very well possible that Mamiya Germany had 
sold the last ones to....Rollei. My ears grew twice as long of 
course....:-)) It appears that they made a small first batch of about 
50 or so, and didn't see a need for their own design. But demand was 
higher than expected, and in hindsight they should have designed one 
from scratch. My comment that the Mamiya backs were out of production 
(according to Mamiya Holland) made him scratch behind his 
ear....they hadn't checked their supply for a long time either....8-))
The solution came on the PhotoKina last year....I went straight to 
the Mamiya stand, pulled the most important looking Japanese rep by 
his tie, and interrogated him. He immediately started digging in the 
brochures, and with a big smile he pointed at the 70mm back in the RB 
brochure. I then pulled the Dutch rep by his tie, who sheepisly 
said that if everything not in the Japanese pricelist was not in 
production, brochure or no brochure.
It suits them well that both my 70mm backs now come from the US!....:-))

> The spacing between adjacent hassy images on 70mm is 63 mm, which makes
> sense based on the above 8mm spacing as the images are actually 5.5 x 5.5
> cm!
> You can thus calculate the length of film needed for a given number of
> frames, also you need some extra for a leader and trailer.

Look at it as serpentines, apply generously, makes life much nicer....:-)) 


- -- 
Bye,

Willem-Jan Markerink


      The desire to understand 
is sometimes far less intelligent than
     the inability to understand


<w.j.markerink@xxxxx>
[note: 'a-one' & 'en-el'!]
*
****
*******
******************************************************
*  To remove yourself from this list, send:          *
*         UNSUBSCRIBE INFRARED                       *
*       to                                           *
*         MAJORDOMO@xxxxx                            *
*----------------------------------------------------*
*   For the IR-FAQ, IR-Gallery and heaps of links:   *
*  http://www.a1.nl/phomepag/markerink/mainpage.htm  *
******************************************************

------------------------------