Hope somone can help. I've been through all the various posts on v700 banding and ruled out the most common problems. The calibration area has been cleaned thoroughly, negs clean and developed in the same batch.
I'm getting banding on some 4x5s right across the entire neg. From what I can deduce, it seems to occur when negs that are faily dense (ie overexposed) with large areas of cloud. See the images below - all from the same hour's shoot. This happens on medium format scans when the images are over exposed/dense. Occurs on portra, fuji 160ns which I shoot regularly.
I'm fairly experienced at scanning and I've optimised my 4x5 holder very precisely, resulting in very sharp scans. I only use the holder too - no wet scanning direct to the glass as my particular scanner isn't too great in this regard. I've scanned the negs exhibiting the problem at a variety of resolutions from 600-4800dpi and I've flipped the negs around to orientate them to test using emulsion side up and down, and the banding still appears right across the scan.
My guess is it is some type of reflective issue but
Banding here across whole neg. Sharpened to accentuate the lines
Close up of the noise from another image
No banding/noise in this image rom same shoot.
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