Article on scanning large format

Discussion in 'Scanning and Scanners' started by hsandler, Jul 20, 2018.

  1. hsandler

    hsandler Subscriber

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  2. Trask

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    Thank you for sharing this interesting article with us. While I don’t shoot 4X5, I have many Polaroid 665 negatives 3 1/4X4 1/4 that I want to scan, so your technique of taping the negative to the AN glass is interesting. Do you not find that the scanner may “read” the AN surface through the negative, in some manner, creating a bit of false grain in the image, especially in clear areas of the negative? Also, what tape do you use? Thanks again.
     
  3. shutterfinger

    shutterfinger Subscriber

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    I've been using Blue Painters Tape for years, leaves no residue.
    The newer painters tape should work well also.
    Scotch Magic Transparent Tape is a PITA to remove and leaves a residue as does Scotch Wall Safe Tape although its easier to remove.
     
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    hsandler

    hsandler Subscriber

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    Good questions. No, the ANR glass is on the side away from the scanning lens, and since it's transparent and backlit, it only diffuses the angle of arrival of the light rays bit, perhaps similar to a diffuser enlarger compared to a condensor enlarger, but does not seem to add grain or texture. I find ordinary masking tape is fine, and a bit of lighter fluid dissolves any residue.
     
  5. hoffy

    hoffy Subscriber

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    Excellent write up. Quite similar to how I scan 120 and 35 mm. I'm still using the default holder, though for 4*5
     
  6. Trask

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    Another question occurs to me: where did you find a large sheet of AN glass for sale?
     
  7. Poisson Du Jour

    Poisson Du Jour Subscriber

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    A good read and insight into individual methodology.
    Years ago I almost ended up being gifted a Graflex. I declined because at the time I had left darkroom practice in the small country town where I lived at the time.

    I do not rely on sharpening to reveal dust; it is cleaned up with narrow-radius pattern clone), with magnification at 300% to 400% and manual de-spotting. As you can imagine, there is a lot of movement across the screen, but generally the "bugs" are very, very minimal. Sharpening applies most often to desktop scanners with very high variability; it is not often employed with drum scanners e.g. the Hasselblad Flextight, but that's another kettle of beans entirely!
     
  8. shutterfinger

    shutterfinger Subscriber

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    hsandler

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    I don't know, as the sheet I use for large format was purchased with the scanner. It is thinner than the ANR sheet I use for medium format, which was purchased from betterscanning.com. I have read about people using ordinary anti-glare framing glass. Perhaps you could try that first.
     
  10. Mick Fagan

    Mick Fagan Subscriber

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    Very interesting read, thank you.

    Mick.
     
  11. Trask

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    You’re right of course, I should change my profile. Since 2005 I’ve lived in Amman, Jordan; Paris, France; Riyadh, Saudi Arabia; northern Virginia USA; Islamabad, Pakistan; Paris, France again and northern Virginia again to this day. So in those years I didn’t want to be changing my profile every couple of years!
     
  12. shutterfinger

    shutterfinger Subscriber

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    It should read Globe(al) Hopper.:smile:
     
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