Canon 7 light leaks. Solutions?

[Iodosan]

I have a problem with light leaking on my canon 7. What do you think causes it? A shutter problem?

 

[koraks]

A shutter problem?

Probably not, since the fogging extends beyond the image frame. It's likely related to the back, hinges etc.

 

[miha]

I suspect the fogging occurred during development.

 

[Dan Daniel]

It can be helpful to put the negative inside the camera as it would have been when shot. And pay attention to areas of film before and after the actual image area as it comes out of the cassette and goes around the take-up spool. For example, the fogged area below the Christ figure appears to have a hard edge on one end and a fuzzy edge on the other. I forget the size of the Canon 7 and film path, but I wonder if this section of film was exposed between the film cassette (fuzzy end) and image gate (hard end). Meaning the leak is in the cassette chamber. Well, just spitting in the wind here but you get the idea. Sometimes the film tells you exactly what happened. Sometimes! Light leaks can be very difficult. Good luck!

 

[koraks]

I suspect the fogging occurred during development.

With this pattern of fogging that's virtually impossible.

It can be helpful to put the negative inside the camera as it would have been when shot

That's a great idea!

 

[grain elevator]

In what condition are the light seals? This is probably one of the vertical ones, as the fogging is even across the while film.

 

[miha]

With this pattern of fogging that's virtually impossible.

If one uses a light-leaking developing tank or a changing bag that is not light poof anymore, any pattern is possible.

 

[koraks]

If one uses a light-leaking developing tank or a changing bag that is not light poof anymore, any pattern is possible.

That's not quite true. The hard edge to the fog you see at the bottom of the strip is impossible to create during development. It shows that part of the film is masked by something in direct contact with the film. That excludes a development tank.

 

[miha]

Until OP show us the whole film strip and share some additional detail we can only but guess as to the reasons behind these leaks.

 

[Don_ih]

Not a shutter problem:

This is the shadow of one set of sprocket holes that you see between those sprocket holes, sharply defined. So, the take-up, the actual cassette, or something happened while the film was out of the camera, out of the cassette, not yet on the developing reel.

 

[Nopo]

FWIW, This is the same type of fogging I had on my hp5 plus and foma 400 on a pentax ME, it was solved when I sealed the vertical area of the lid hinge.


Carlos

 

[reddesert]

The Canon 7 has a strip of foam on the body next to the hinge that may be very dried up or nearly gone. That's not definitively the cause, but it is a place to look.

 

[kl122002]

Is it just happened randomly or in a pattern?
Is this film developed by OP himself or processed by machine ?

The Canon 7 has a strip of foam on the body next to the hinge that may be very dried up or nearly gone. That's not definitively the cause, but it is a place to look.

True , this foam could leak. But other than that I can't remember another possible places for leaking from back.
Or the back door was accidently opened a little without notice?