Re: 70mm Pioneering Blues

["David M. Young" <david@xxxxxxxxxxxxx>]

At 10:04 PM 9/11/99 -0400, you wrote:
>I still haven't gotten anywhere with the 70mm.  I have burned heaps of the
>film now, but the problems are getting ridiculous.  For the investment it
>takes to get into 70mm, I am starting to wonder when I should cut my
>losses.  Unfortunately, my artistic craving keeps me reaching.

I hear that...  Fortunately I haven't had quite the problems you have.....

>I sent a note to the Infrared group outlining a couple problems.  I did it
>on general principle, thinking it might help others.  However,  my problems
>are also below, if you have the time to respond.

No problem, and I'm CC'ing the group. 

>Problem #1
>I seem to have a light leak problem with the 70mm back.  I burned several
>rolls of film and processed them and all of them have a flash going through
>almost every frame.  I sent it to the Camera Wiz and they put new foam all
>around the edges and fixed a tracking problem I was having with the back.
>I still have the same light leak problem.

I sent mine directly to the Bronica repair center (via my local camera
store), and they re-felted and fixed a couple of gears that were worn
down... I went straight for it though and did it before I put the first
frame through it.   A "flash" through each frame doesn't sound like a felt
problem though, so I'm not sure what to suggest.    Pardon this stupid
question... but I just thought of it and have to ask...  You are loading
the back in a changing bag that's known and been tested as safe for HIE??

>David, have you ever had the problem of the film coming off track and
>jamming inside the film back?  I have run in to it three times now.

Yep... been there done that , actually had it happen today as a matter of
fact.  It's VERY important that you make sure that you take up ALL the
slack  before you put the face onto the back by turning the knob on the
side (I usually do it before I put the side on).  Make sure all the slack
is gone and that the sprockets are poking through the holes in the film.
You can also move the larger sprocket a bit to help align things... but
above all, make sure the film is tight and that the pins are poking through
before you close up the back. 

>I have scratches through the film.  I assume it is happening in the Alden
>loader.  Has anyone else had this problem?  Do I need to sand some edges?
>I stuck my finger in the loader (while in the black bag) and I couldn't
>feel any sharp edges where the film would be touching.

Are you using used cartridges??   I'm fairly skeptical of them ever since I
noticed that the two that I originally got with my back had either slimy or
hard and crusty felt on the lip.   That hard and crusty stuff would scratch
the heck out of 2424. 

>PS: my new tank I had customized works beautifully.  It was a pretty cheap
>fix since I did a trade with the welder.  He needed some head shots.

Cool!  I *Finally* got my 70mm Jobo reels, and will be processing my first
batch tomorrow (I've been taking it to a local pro-lab for processing) .


Cheers, 
D.

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David M. Young  |  david@xxxxxxxxxxxxx  |  http://www.cloudance.com
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