Hi

New to LF and developing in general. My first 3 frames have all got a brighter area in one side / corner of the negative. Can you help me understand if it is a problem with a light leak or with the development. I can see it clearly in the border. Not sure how a light leak could get into the border of the negative so I suspect a development issue, but I am really inexperienced so not sure.

It is not a scanning problem (scanned with digital camera) since I see the difference in the negative also.

Chamonix 4x5 camera
Rodenstock 150mm lens
Toyo film holder
Kodak TMAX100
Ilford DD-X 1+4 @ 20c
7min Development according to massive dev chart app.
Ilford stop
Ilford fix
Paterson tank with mod 54
1l of each of the fluids


Example 1 and 2 was taken and developed together while example 3 several days later and developed separately, although with same method. I am certain that 1 and 2 was in one Toyo holder and 3 in a different one.

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Any help would be greatly appreciated!
/ Klas