Well, Hugo is looking into it. Meanwhile, I put my 6x12 back on that had a roll of konica 750 in it. I attached it to the back and pulled the darklide (done indoors, overcast) for 3 minutes with the lens caps on. Same results, very dense negs all the way through except one shot I had done a few weeks back indoors near the window. I'll post the usable shot when it's dry.
Don't you simply have a very small light leak in your bellows? Since the Efke film needs to be rated at very low ISO, say 1-6, you will always have long exposure times, and hence probably also considerably longer times with the dark slide open compared to "normal" film shots. You may therefor not have noticed the fogging with normal film... Have you tried leaving a normal piece of film for some time in the camera with the dark slide open and see if it gets fogged?
Or better, put some LED light in the camera and take the camera into a completely dark room and see if there are leaks anywhere.
Here's the only neg from the roll film back that wasn't fogged to death. This was late in the day with an exposure over a minute I believe. I have a leather bag bellows (shen hao brand) that I also use on this camera which I could use but that limits me to 210mm lenses. I'm sure wrapping the camera in foil wouldn't attract any attention by homeland security!
Have you checked the shutters? Or are using plastic lens boards? The plastic can be transparent to IR and opaque to visible light. If you can find a friend with an digital camera with the IR filter removed you can do a inspection with the back off the carmera.(please no heart attacks)
The plastic can be transparent to IR and opaque to visible light
I was always told that this is a pure bullshit photo myth. The Efke IR820 data sheet sez so, at any rate. Carry-on X-rays too. They say a hand inspection is more dangerous that having the film scanned...especially 135 format.
Last edited by 2F/2F; 04-29-2009 at 08:32 PM. Click to view previous post history.
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