A partially exposed roll left in the camera for a length of time,
with the customary bumps and movements, can have the film loosen the
tension. Lets say one a camera in the trunk of a car for a few weeks
or months with a roll in in it. There's bound to be some movement
that can spacing differences.
Slobodan Dimitrov Studio G-8, Angels Gate Cultural Center http://sdimitrovphoto.com
On Feb 16, 2006, at 8:59 AM, Jim Brick wrote:
At 08:36 AM 2/16/2006 -0800, Bob Haight wrote:
I should have taken Jim Brick's course on loading Hassy mags because so often the negs are not evenly spaced, fine, just not perfectly spaced like the Rollei. Bob H.
Perfect spacing in a Hasselblad film back has nothing to do with how you load it.
It has everything to do with the condition of the back, that is, if it needs a CLA. It is in the gear train and if it is worn, or dirty, or whatever. Even a new back can have a problem.
The other source of uneven spacing is different sized spools. For years, and maybe still, Ilford spools were slightly larger in diameter than Kodak/Fuji spools, and if one interchanged film manufacturers, uneven spacing resulted. But there should never be overlapped frames. Overlapped frames usually means a gear train problem.
The real problem is that frame spacing is based upon how the film winds on to the take-up spool. If you put 120 film into a 220 Hassy back, you can only get eleven frames because there is a paper backing that makes the take-up spool wind get larger faster, hence, the frame spacing gets wider and wider as you shoot. The 9th, 10th, and 11th frames are w-a-y far apart.
Jim --- Rollei List
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