This is from a roll of Ilford D3200 I shot under moonlight on 29Jan18. The scanned images have vertical banding of alternating tones. This is not visible on the negatives under a loop. Any ideas about what might cause this?
The grain seems to actually enhance the image, but, alas, you need to agitate better: the negative shows ugly 'vertical bromide drag' on the water and sky. Using the Planar to enhance this is, in and of itself, a 'drag'. I really wonder whether those negatives are a clean as you propose. Seeing this 'drag' is difficult unless you are looking at the right light angle. I could be wrong, but I will opt for deficient negative agitation as the culprit. Maybe, however, the digital gremlins are at fault. - David Lyga
Thanks to all for the responses.
I have just re-scanned the negative at 90 degrees as Reinhold suggested and it has fixed the problem! Many thanks Reinhold you are a genius! Now I need to understand what is going on with this scanner and these particular negatives. Tomorrow I will clean it up and post it here together with the 4x5 I took that evening.