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Re: [OM] 612 film back advice is needed.

Subject: Re: [OM] 612 film back advice is needed.
From: Michael Wong <mialop@xxxxxxxxxxxx>
Date: Sat, 21 Aug 2010 19:52:26 +0800
Chuck,
I readlly do not know the reason. Anyway, I hope I can find a good option of
612 film back. I have asked a shop that a new Horseman 612 filmback will be
over HK$5,000 .......... 612 is not my major shots, HK$5,000 is very
expensive :(


---
Michael



On 21 August 2010 19:43, Chuck Norcutt <chucknorcutt@xxxxxxxxxxxxxxxx>wrote:

> I would assert that the only way your film back can cause a problem is
> to leak light.  I didn't see anything that looked to me like a light leak.
>
> Chuck Norcutt
>
>
> Michael Wong wrote:
> > The procedure is same as to take 4x5 shots except put different film back
> on
> > my machine. After the shot of 612, I put the dark slide into film back
> and
> > rotate the knob for film advance & then put my 612 film back away from my
> > machine. I do similar procedure for my 4x5 shots but no problem at all.
> > Moreover, I took both 4x5 shots & 612 shots that day but 4x5 shots are no
> > problem.
> >
> > I do not think my procedure, my machine, my lens has error to cause the
> > color shifting error since the problem didn't appear on 4x5 shots. Is it
> > film problem? Development error? Or film back problem?
> >
> >
> > ---
> > Michael
> >
> >
> >
> > On 21 August 2010 03:30, Jeff Keller <om-list@xxxxxxxxxxx> wrote:
> >
> >> Yes, it also looks to me that the images he posted had the problem
> >> "centered" on two adjacent images. He said it was a recurring problem
> but
> >> if
> >> it ALWAYS shows up on adjacent frames, it would seem someone is much
> more
> >> consistent in what they are doing than I would expect.
> >>
> >> The film back has a darkslide which must be pulled out to expose the
> film.
> >> Typically the Chinese made backs use a knob to advance the film until
> the
> >> next exposure number printed on the back of the film appears in a small
> red
> >> window on the film back. If the dark slide were pulled out when the film
> >> was
> >> half advanced it would be possible to partially expose two adjacent
> frames.
> >>
> >> He said that he had color shifts constantly (but maybe not in the same
> >> locations). It's hard to imagine any kind of strictly operator error
> that
> >> would cause it. If his equipment was faulty, maybe his standard
> procedure
> >> causes the problem to recur.
> >>
> >> Jeff
> >>
> >> -----Original Message-----
> >> From: Chuck Norcutt [mailto:chucknorcutt@xxxxxxxxxxxxxxxx]
> >> Sent: Friday, August 20, 2010 7:34 AM
> >> To: Olympus Camera Discussion
> >> Subject: Re: [OM] 612 film back advice is needed.
> >>
> >> I have no idea how roll film is commercially developed.  I was
> >> hypothesizing the roll being drawn through the chemicals and getting
> >> stuck in one place too long.  Totally in my head and without any facts
> >> to support me.  Regardless, some sort of processing error seems much
> >> more real to me than two adjacent images sharing a common defect that is
> >> visible only on about 1/3 of each image and those areas being adjacent
> >> to each other.  What in the camera causes a flaw to appear on the right
> >> third of an image and in the next frame to appear on the left side?
> >>
> >> So far no one has even commented that they see this adjacent image
> >> problem.  Am I imagining it?
> >>
> >> Chuck Norcutt
> >>
> >>
> >> Bill Pearce wrote:
> >>> Those sorts of flaws, where it's not consistently across the entire
> roll,
> >>> are rarely a processing error. Color shifts in the image from side to
> >> side?
> >>> How can that be a processing error. The only thing I've ever seen in
> >> years
> >>> of processing would be a light strike in a machine, but those are very
> >> very
> >>> rare these days, unless you are having film processed at a drugstore or
> >>> somewhere like that.
> >>>
> >>> Bill Pearce
> >>>
> >>> -----Original Message-----
> >>> From: Chuck Norcutt [mailto:chucknorcutt@xxxxxxxxxxxxxxxx]
> >>> Sent: Friday, August 20, 2010 7:29 AM
> >>> To: Olympus Camera Discussion
> >>> Subject: Re: [OM] 612 film back advice is needed.
> >>>
> >>> I haven't seen anyone comment yet on my diagnosis of a film processing
> >>> error.  The was predicated on two successive and supposedly adjacent
> >> images
> >>> showing the same failure... one on the right side and the other on the
> >> left.
> >>> The implication is that, whatever the cause, it crossed over two
> adjacent
> >>> images.  If it happened in-camera it would seem that the film would
> have
> >> had
> >>> to be advanced a half frame and allowed to sit there for a while.  But
> >> since
> >>> there's a color defect involved all I can suppose is processing.
> >>>
> >>> Chuck Norcutt
> >>>
> >>>
> >>> Brian Swale wrote:
> >>>> I've missed a couple of digests so may be behind in ideas on this
> topic.
> >>>>
> >>>> But it occurred to me that after the first shot on a new roll of film,
> >>>> the 6 x 12 back could be removed, rotated 180 degrees, and used for
> the
> >>> second shot.
> >>>> Take note of which end was where on the body, each time.
> >>>>
> >>>> Do that for all images and see what pattern (if any) of colour defect
> >>>> shows up.
> >>>>
> >>>> Brian Swale.
> >>
> >> --
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> >>
> --
> _________________________________________________________________
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>
>
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