Nikon RF shutter

[keytarjunkie]

I am having two issues, and they are both coming from one roll of film. The first is really visible, two lines parallel with the shutter, which create this magenta cast. I believe this is happening on faster shutter speeds like 1/500 or 1/1000. It is (just barely) visible on the negative with a loupe. Don't mind the dust.

The second issue is more of a magenta wash at the same side of the negative. I'm not sure what shutter speeds this happens at, but probably 1/250 or 1/125. I was convinced this was an issue with my scanning, but it appears on the same part of the negative no matter which way it is oriented, so now I'm thinking this is part of the same problem. But there also appears to be a magenta cast at the bottom of the negative too, somehow.

I don't see these artifacts on b&w negative film, only color (but they're probably there too!). I was first fixated on my scanning technique, and then on problems with development, but now I'm thinking this is a shutter issue. It might be temperature related, since these images are from last winter and I have more recent rolls of color film that don't have these artifacts when scanned the same way (example from later roll, I scanned this at the same time and it was taken a few weeks after the "problem roll")


Any thoughts from the internet heros of RFF?

 

[monopix]

I took a copy of the images and split them into their CMYK components. The cast only shows in the magenta channel. I don't see how a shutter problem could do that.

Both of the images have sprocket hole impressions along the top of the image. These are also only in the magenta channel. Here's one with the contrast increased.

If you look at the sprocket holes across the top, there is a dark area around them with a distinct edge. There is another edge vertically to the right hand side of the image (not so clear).

My guess?

This is a processing error and the film has come into contact with another film during processing and there has been some form of transfer between the films.

Were these films processed commercially?

 

[keytarjunkie]

Wow! I am amazed. I don't even know what to say!



I developed it myself, as I do all my film. I used a Jobo 1520 tank and Jobo reels, as I've done many times before without issue. I think you must be right though - the sprockets are hidden in my scanning apparatus so there's no way they could be reflecting into the image. It must be an artifact from developing. Thank you!!

 

[monopix]

Maybe the film came out of the reel then and came into contact with itself.

Maybe someone else will have another explanation but I can't think what else it could be.

 

[Larry H-L]

The banding on the right side appears in two separate frames in almost the same area, it seems unlikely to me that a processing error would look so similar on both frames.

Could there be two problems showing here, processing and a bit of shuttter bounce?

 

[monopix]

The banding on the right side appears in two separate frames in almost the same area, it seems unlikely to me that a processing error would look so similar on both frames.

Could there be two problems showing here, processing and a bit of shuttter bounce?

If the film was in contact with another film, or another part of itself, the frame alignment would be similar across more than one frame.

And I still don't see how a shutter can expose only one layer of a film. Plus, the banding is a darkening of the image whereas shutter bounce would lighten the image.

 

[Larry H-L]

Thanks for the explanation!