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Grid noise pattern - Minolta F3000

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willfrancis

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Hello hello! I recently got hold of a pair of second hand Dimage Multi F3000 (alas, not the Pro version) scanners and have consistently found strange artifacts in my scans from each (samples below). I'm wondering if anybody else might have come across something similar and perhaps know how to fix it? As best as I can describe what's going on, the scans are characterised by a tight grid of RGB lines which are especially visible in shadow areas (but also more faintly in any broadly monochromatic areas). I have wondered whether the cause might be some sort of dust on the CCD itself; however, I was surprised that both scanners should exhibit the exact same pattern which leads me to think that perhaps there's a software or calibration issue... Any thoughts? The first two images are from a 35mm E100 slide scanned at 2820 ppi; the second is from a medium format Velvia 100 transparency scanned at 1128 ppi. Am I simply being unrealistic with my expectations from this model? Thanks! example.jpg example2.jpg example3.jpg
 
I forgot to mention: I have played around with multiple passes and samples, but this doesn't seem to make much difference. I'm running the scanner on Vuescan with Windows 7.
 
Looks like it might be a fixed noise pattern from the sensor. Are these particularly dense media? Slides or Negatives, or does it matter?

Have you tried backing off the resolution to see if it disappears? It might be a faithful scan of the irregularities of the movement of the scanner sensor...
 
Thanks very much for the suggestion. I tried playing around with both input and output resolutions and reduced as you mentioned - still no change unfortunately. If it is a case of sensor noise as you suggest, what are my options? I had hoped that replacing the initial unit (sold quite cheaply as seen) would fix the problem which is why I ended up buying the second one as it was verified working; however, it seems now as though the issue is with the model itself...
 
No, sorry! I have no experience with that model; I was just speculating about the possible cause. Wish I could help more...
 
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