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Scan grain aliasing
I just read an article on grain clumping in scans; some other thread here
had a link that probably led me to that. I forget the details. Anyhoo... I was just cleaning up some scans made the previous evening, and noticed two frames shot within minutes of each other, in the same lighting, scanned with the same settings, came out quite a bit different. One was baby butt smooth; the other clumpy and wooly. Ah ha! grain aliasing illustrated, I thought. And then I remembered the details of that second shot. It was overexposed to the point of clipping on my flatbed; not enough Dmax. Overexposured, and then developed N+ with halfwit guesstimated temperature conversion. It's crispy-critter fried. But a pretty severe Photoshop curve made it quite acceptable and usable. So acceptable and usable, in fact, that I forgot its crap origins briefly. Here's my take on grain aliasing. Maybe it happens. I think it just as likely that other, more easily explainable causes are at work. Whether it's from hitting the scanner limits, or Photoshop artifacts, or simply the manipulations accentuating the otherwise hidden noise, it's not always (if ever) this mysterious aliasing. So, what does digital noise have to do with MF? Nuthin'. It wasn't even roll film. I was just too lazy to switch NGs before posting. |
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