iiia and iiif first rolls - what has happened?

[Fernando Mattos]

Advertisement (gone after registration)

Hi! I've just developed my first roll of a iiia and a iiif I just bought. The iiia was in poor condition, but working, and had less issues in the photos. The iiif was in pristine condition, professioned CLA a couple years ago, but had horizontal dark streaks in almost half the frames, randomly.

1) here are the defect in the iiif photos. I've had two consequent photos that one is like this, and the other is normal. FIY, I shot a rewinded double x.

Welcome, dear visitor! As registered member you'd see an image here…

Simply register for free here – We are always happy to welcome new members!

 

2) with the iiia i shot a Ilford hp5, and I had none of these black streaks, but I had consistent horizontal black fine lines in the final photos. Sometimes they seem equispaced.
Here a zoom stripe of a photo that show those lines

And here againg. It's, in a less or mre degree, in all frames.

 

Any thoughts on what might be causing thoses problems? In the iiif seems a problem with the curtain shutter, but I don't know how bad is it to fix. in the iiia I have no idea...

[Advertisement]

The Leica Q3 is available for pre-order at B&H Photo Video and Adorama

[TomB_tx]

The IIIf needs the shutter curtain speeds adjusted for use at high shutter speeds, as it looks like the closing curtain is catching up with the opening curtain part way across the frame. The dark streaks are due to the roughness of the edges of the curtain ends shading the film as the gap between the curtains narrows. At high shutter speeds there is a very narrow slit between the curtains and it doesn't take much drag to cause things like this.

The camera may well be fine at slower shutter speeds, so you can try stopping the lens more and using slower speeds and see how that works. if you use (exercise) the camera a lot it's possible that the condition will improve. (You can try this without film, just keep winding and tripping at various speeds.)

The few fine lines on the IIIa look like scratches on the film back side. Hard to identify the cause - it can even come from wiping the film in processing.

[jerzy]

vor 23 Minuten schrieb TomB_tx:

The few fine lines on the IIIa look like scratches on the film back side. Hard to identify the cause - it can even come from wiping the film in processing.

it could be as well film pressure plate. Without a film,  open shutter at T and check if you see any scratches

[Fernando Mattos]

Thank you, @TomB_tx and @jerzy! I'll follow your advices

[qqphot]

The first two of your photos were probably shot at a fast shutter speed, where the curtain gap is narrow, and so unevenness in the curtain edge becomes visible in the photo as it accounts for a larger fraction of that narrow gap. In addition, the gap is uneven, becoming wider from left to right on the final image, indicating that the curtain tensions are not correctly adjusted.

My experience with more than one of the usual leica CLA guys has been that unless you specifically request it they don't necessarily return them with the curtain tensions adjusted very accurately, or perhaps they don't remain accurate during shipping, or something.

 

[Fernando Mattos]

24 minutes ago, qqphot said:

The first two of your photos were probably shot at a fast shutter speed, where the curtain gap is narrow, and so unevenness in the curtain edge becomes visible in the photo as it accounts for a larger fraction of that narrow gap. In addition, the gap is uneven, becoming wider from left to right on the final image, indicating that the curtain tensions are not correctly adjusted.

My experience with more than one of the usual leica CLA guys has been that unless you specifically request it they don't necessarily return them with the curtain tensions adjusted very accurately, or perhaps they don't remain accurate during shipping, or something.

 

Hum, good to know! I'll eventualy have it serviced, and then I'll specify this issue. Till then, I'll keep using a bit slower speed to avoid the issue, testing the higher eventualy to check if it persists.

[Fernando Mattos]

Advertisement (gone after registration)

Nice to have you all here to help! Thanks again!