RB Mystery? Or Fixed First?

Ten exposures. One totaly blank 120 roll.
Did I fix first? My one-shot fix is down the drain.
A clue may be the Acros 100's ID and frame numbers
well defined along one edge.

Maybe some mechanical quirk I've not noted? The film
advanced and on the take-up spool after the end of ten.
The previous few rolls have been OK. The RB-Pro S, IIRC,
has double exposure prevention and dark slide check.

What else? Mirror up and cable release. What have
I overlooked or forgotten? Dan

2 choices here...

Dark slide in. Not all backs interlocks work with all bodies on the rb cameras from my experience. My ProS does not interlock, my Professional does on most backs. You figure it out, I can't.

Lens set for mirror up operation. It's just a little twist there. You do have a double cable release or you are firing the mirror first then using the cable on the shutter?

Third slight possibility... you ran the roll back side facing the lens. I have never done it in the rb, but.. in a TLR or two, it's happened.

tim in san Jose

If the dark slide is not fully in, i.e. about 1/4" out, it will appear to work normally and give you plenty of blank frames.

If you have frame numbers down the film's edge then your processing is o.k.



Steve.

One further possibility - RB67 Pro SD fitted with C lens - if lens is set for mirror-up operation and camera is fired normally using body release and no cable release, the mirror will make the usual clonking sounds and film will wind after button is pressed but the film will not be exposed!

Regards,

David

David H. Bebbington said:

One further possibility - RB67 Pro SD fitted with C lens -
if lens is set for mirror-up operation and camera is fired
normally using body release and no cable release, the
mirror will make the usual clonking sounds and film
will wind after button is pressed but the film will
not be exposed! Regards, David

Click to expand...

I think that is where I went wrong. If in MU mode and the
body shutter is released the shutter closes and the mirror
goes up; no exposure. After it is possible to reset the
mirror, open the shutter, and advance the film as
though nothing went awry. The shutter has
remained cocked.

That's my favored explanation. How did that happen?
The lens shutter was from and even before loading film
in MU mode. Very rarely do I shoot other than MU and
then only for 1sec and longer exposures. I knew I was
headed for long exposures but forgot to reset. When
shooting the sound was not quite right but haste
made waste.

Two hours drive, an hour plus on the trail to and from
the falls. I'll visit again. Glad the developer was OK. Once
again my 8-80 D-23 1:7 but a slightly increased agitation
and a minute more. A close look at those edge markings
may give a clue for a more proper development.
Not a lot to go on. Dan