Darkened Corners

[Paulp]

On some 35mm and medium format negatives I have scanned, I have noticed that the corners are more than 1 stop underexposed than the center. In each case,photos of a wall,the illumination was even. There were no shadows. The lenses were 35mm. I used an old Rolleiflex and an Olympus 35rc both leaf shutters. Maybe that is the problem yet the rest of the frames on the roll are fine. Any ideas?

[LSI_Ketelhohn]

Dear customer,

Which scanner are you using?
Most known devices use a lamp which moves with the sensor.
So if this would be a lighting issue the bright/dark areas would be stripes in scan direction.
If only the corners have a lower exposure than the central part it is most likely an issue which exists in the images themselves.


kind regards,
Arne Ketelhohn.