Light leak

What is the chance that loading the film holder is user error?
Do you think film holder loading error could be the reason or cause of the light leaks?
 
MartyNL said:
What is the chance that loading the film holder is user error?
Do you think film holder loading error could be the reason or cause of the light leaks?
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The chance for sure exists! How big it is I do not know. And, yes, It is possible that the reason is this. By the way, I’ve noticed that the Toyo holders are way more easier to be loaded than the Lisco Regal holders.
 
I noticed quite a lot of wear on the black tape of your Toyo film holder, how does this wear compare to the black tape on your Lisco Regal holders?

Could the tape wear on the Toyo also be the reason for less resistance than the Lisco Regal?
 
MartyNL said:
I noticed quite a lot of wear on the black tape of your Toyo film holder, how does this wear compare to the black tape on your Lisco Regal holders?

Could the tape wear on the Toyo also be the reason for less resistance than the Lisco Regal?
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The light leaks are on the upper side of the film. always ad the film notch, so not possible. And i am loading the film with the notch on the upper right side
 
On most if not all modern plastic holders the flap end is mechanically light-trapped, so the state of the tape shouldn’t have any bearing on it, assuming the flap is held in position.
 
Christo said:
The light leaks are on the upper side of the film. always ad the film notch, so not possible. And i am loading the film with the notch on the upper right side
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Not light leak, why Toyo film holders are easier to load than his Lisco film holders.
 
The only time I have seen an over-exposed spot on the film like this is when I had a Linhof/Wista compatible lens board that had a notch for the anti-twist screw that was a bit too deep. The lens retaining ring did not fully cover it, so with strong light in front of (and falling on) the front of the camera I got an exposed spot from light leaking through.

A bit of black tape fixed it while I found a replacement lens board.

If you are going to run more tests, take a digital picture or make a sketch of what the light is like on the camera, and where the sun lies.

Small fogging areas are easier to identify if you know where the bright light was outside the camera. Light generally travels in a straight line, unless reflected or diffracted.
 
MartyNL said:
I noticed quite a lot of wear on the black tape of your Toyo film holder, how does this wear compare to the black tape on your Lisco Regal holders?

Could the tape wear on the Toyo also be the reason for less resistance than the Lisco Regal?
Click to expand...
There actually was caused by my second Linhof Master Technika Classic (2004). As ad the same moment I bought another 6 brand new Toyo holders from Sakai Instruments. And they rapidly had the same thing, But I do not think that this is an issue - only aesthetic .
MartyNL said:
Not light leak, why Toyo film holders are easier to load than his Lisco film holders.
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I still do not know why.
Dave_P said:
On most if not all modern plastic holders the flap end is mechanically light-trapped, so the state of the tape shouldn’t have any bearing on it, assuming the flap is held in position.
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Yes, the flaps are covering several milimeters of the film, where actually the leaks are...
 
Something that hasn't been mentioned...
Have you looked at the lens?
A speck of dirt inside the glass?
The shutter, and how it's attached to the cells?
The lensboard and how it's connected to both camera and shutter?
A very small, (perhaps something worn or chipped) bright spot inside the camera, reflecting light onto the film?
And have you tried a different lens?

The design of the film-holding rails in a DDS differs between manufacturers. ( ...square or rounded, tapered or straight, etc) I've found that you need to bend the film by different amounts for different makes, which seems to alter the force needed.
That might account for greater or lesser ease of loading. It may also be the case that the materials used, although obviously similar, have different surface finishes and hence different coefficients of friction.
Another factor is the springiness of the hinge tape. If it folds back easily, it's easier to load the film. If it's springy, it rises back up and makes you wish for a third hand.

You might try examining the screen while focused on a lightbox rather than an actual scene. It might help, but this is only a guess.
 
David M said:
Have you looked at the lens?
A speck of dirt inside the glass?
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There is no such think. No way the dirt to accumulate for a week between selling the Arca and buying the Linhof. All my lens were attached since the begging on original Linhof lens boards. The lens a mounted on Prontor Professional with TK unit form Linhof.
David M said:
A very small, (perhaps something worn or chipped) bright spot inside the camera, reflecting light onto the film?
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Yes, I need to have look.
David M said:
The design of the film-holding rails in a DDS differs between manufacturers. ( ...square or rounded, tapered or straight, etc) I've found that you need to bend the film by different amounts for different makes, which seems to alter the force needed.
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Yes, I agree. I had Fidelity, Linhof, LIsco and Toyo holders. The best in my opinion are the Toyo holders. Never had or user Sinar holders. Unfortunatly Toyo closed doors at the end of January...
 
The lens was always a long shot, but bits of paint do occasionally flake off.
I agree about Toyo holders. Didn’t know they had ceased production. Fortunately I have enough. Haven’t tried the new Intrepid ones.
 
David M said:
The lens was always a long shot, but bits of paint do occasionally flake off.
I agree about Toyo holders. Didn’t know they had ceased production. Fortunately I have enough. Haven’t tried the new Intrepid ones.
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The intrepid are way more expensive than the Toyos. At least the price that I’ve paid direct from Japan. The Chamonix holder looks very very nice, but too expensive.
 
Just interested here in why the newer Toyo holders are mythologised so much? Ive got one, a couple of older Toyos, and a mix of older Fidelity/Lisco plastic and metal handle models, in both very worn and like-new condition. By far my preference is for the bog standard plastic handled Fidelity ones.
 
Ha! I have 10 Toyo Double holders on the way from Japan right now...the price was right!!.:)
 
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So, I just developed the last 10 sheets and yesterday wen t to the local LAB where I left 10 sheets. All 30 sheet does not have any light leaks at all...
Dave_P said:
Just interested here in why the newer Toyo holders are mythologised so much? Ive got one, a couple of older Toyos, and a mix of older Fidelity/Lisco plastic and metal handle models, in both very worn and like-new condition. By far my preference is for the bog standard plastic handled Fidelity ones.
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I find the material is better quality. Inserting the sheets is way more easier. My last 6 DDs from Toyo have metal dark slide. Which I like and dislike. I like it because it is robust and I dislike because is can condense.
 
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