Hard shadow on hasselblad negatives

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Dr Dik

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I’ve seen this with my SWC and 501 cameras with two different backs. Anybody seen this issue? David Odess, HB in New Jersey and a friend who uses the same rigs have not. I can’t see anything in the cameras that’s casting a shadow. Thanks.
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Scott Micciche

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I had a similar, thinner issue. I ended up using matte paint on the rollers and I have not seen it again, so I suspect it was a reflection of some kind.
 

Sirius Glass

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That is the image from the film clamp on the edge of the film back. Nothing to be concerned about and nothing that you can eliminate. Just crop the edge of the negative when you print it in an enlarger. A slide holder will cover this area anyway.
 

warden

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I’ve seen this with my SWC and 501 cameras with two different backs. Anybody seen this issue? David Odess, HB in New Jersey and a friend who uses the same rigs have not. I can’t see anything in the cameras that’s casting a shadow. Thanks.

I’ve never seen this from either of my Hasselblad backs. You’re getting this problem on two different cameras with two different backs?

The darker area in both of your pictures is sky. if there were branches there would we see them or would they be completely hidden?
 

pentaxuser

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That is the image from the film clamp on the edge of the film back. Nothing to be concerned about and nothing that you can eliminate. Just crop the edge of the negative when you print it in an enlarger. A slide holder will cover this area anyway.

The OP's darker edge appears to be in the negative area and not the rebate. Have I got this right? If I have then if there were negative details there it would mean cropping out part of the negative that you might want to retain, wouldn't it?

Thanks

pentaxuser
 

Sirius Glass

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That is the image from the film clamp on the edge of the film back. Nothing to be concerned about and nothing that you can eliminate. Just crop the edge of the negative when you print it in an enlarger. A slide holder will cover this area anyway.

See the tab circled in RED
IMG_2933.jpg
 
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Dr Dik

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That is the image from the film clamp on the edge of the film back. Nothing to be concerned about and nothing that you can eliminate. Just crop the edge of the negative when you print it in an enlarger. A slide holder will cover this area anyway.

Good theory but the thing is, this shadow can appear on both sides of the negative and extends beyond where the film clamp grips the film. Very irritating.
 
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Dr Dik

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I had a similar, thinner issue. I ended up using matte paint on the rollers and I have not seen it again, so I suspect it was a reflection of some kind.

If it was a reflection, the density would be greater wouldn’t it? This is a line of less density so it’s the result of the opposite of a reflection.
 
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Dr Dik

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The OP's darker edge appears to be in the negative area and not the rebate. Have I got this right? If I have then if there were negative details there it would mean cropping out part of the negative that you might want to retain, wouldn't it?

Thanks

pentaxuser

What’s “ the OP”? The shadow would darken anything underneath and it’s often difficult to see unless it’s on a smooth tone. I had to tweak curves to exaggerate it for better illustration.
 
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Dr Dik

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I’ve never seen this from either of my Hasselblad backs. You’re getting this problem on two different cameras with two different backs?

The darker area in both of your pictures is sky. if there were branches there would we see them or would they be completely hidden?

Yes, different cameras, different backs. I sent one A12 for service at HB and it still does it. The shadow will darken anything underneath.
 

JerseyDoug

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If this is happening with all of your Hasselblad cameras, all of their film magazines and different film stocks I would look further downstream in your workflow, i.e., developing or scanning.
 

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Are you sure this is not a scanner issue? Do you see lighter bands along the edges when you inspect the negative itself? Mask the borders of the negative and rescan.
 
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Dr Dik

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If this is happening with all of your Hasselblad cameras, all of their film magazines and different film stocks I would look further downstream in your workflow, i.e., developing or
Notice that the shadow repeats the shape of the edge perfectly, including the "v" notches.
Exactly Steven. I’ve been processing 120 film since 1975 from more than a dozen different cameras and have never seen any processing problem like this. Very irritating.
 
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Dr Dik

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Are you sure this is not a scanner issue? Do you see lighter bands along the edges when you inspect the negative itself? Mask the borders of the negative and rescan.

BRBO, It’s visible on the negative with a loupe. I’ve had weirdness with scanning but this is definitely on the film.
 

reddesert

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I don't use a Hasselblad (although I have looked at a film back). Several observations:

- it is helpful when diagnosing a light leak or artifact to see the whole negative

- I assume that the negatives have been inverted so this is an actual dark area, lighter on the negative (less exposure).

- the film clamp should be behind and outside the square aperture of the back and not casting a shadow

- the fact that the notches are visible in the shadow is extremely informative.

Assuming that this is not a scanning artifact and the shadow with notches is present on the negative, you have to ask what angle light could be coming from to cast the shadow with notches into the image area. It must be coming from roughly the side of the body chamber. I suspect either a light leak, or you have very bright light (such as bright sky, sun outside image) that is lighting up the side of the chamber and reflecting [somewhat] diffuse light onto the negative. The shadow of the back aperture is screening out that diffuse light near the edges.
 
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Pieter12

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That is the image from the film clamp on the edge of the film back. Nothing to be concerned about and nothing that you can eliminate. Just crop the edge of the negative when you print it in an enlarger. A slide holder will cover this area anyway.
If it is inevitable, how come I have never seen it on the multitude of full-frame (including rebate) Hasselblad prints and chromes?
 

Sirius Glass

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Good theory but the thing is, this shadow can appear on both sides of the negative and extends beyond where the film clamp grips the film. Very irritating.
No theory, real world fact. Your image only shows the clamp image on one side of the photograph.
 

Sirius Glass

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I don't use a Hasselblad (although I have looked at a film back). Several observations:

- it is helpful when diagnosing a light leak or artifact to see the whole negative

- I assume that the negatives have been inverted so this is an actual dark area, lighter on the negative (less exposure).

- the film clamp should be behind and outside the square aperture of the back and not casting a shadow

- the fact that the notches are visible in the shadow is extremely informative.

Assuming that this is not a scanning artifact and the shadow with notches is present on the negative, you have to ask what angle light could be coming from to cast the shadow with notches into the image area. It must be coming from roughly the side of the body chamber. I suspect either a light leak, or you have very bright light (such as bright sky, sun outside image) that is lighting up the side of the chamber and reflecting [somewhat] diffuse light onto the negative. The shadow of the back aperture is screening out that diffuse light near the edges.

The clamp covers the end of the film to keep the film flat on the film plane.
 

Sirius Glass

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If it is inevitable, how come I have never seen it on the multitude of full-frame (including rebate) Hasselblad prints and chromes?

The clamp is cropped out with printing as stated in my earlier post.
 
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