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Thread: 8x10 Scanning DIY for Epson scanners (v700/v750/v800/v850)

  1. #71

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    Re: 8x10 Scanning DIY for Epson scanners (v700/v750/v800/v850)

    Expect to have the same quality with a 75% larger print

    For 8x10 the epson uses the lower res lens, so you cannot increase 100% the print size while conserving the same scan quality

  2. #72

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    Re: 8x10 Scanning DIY for Epson scanners (v700/v750/v800/v850)

    So even after downsampling there wouldn’t be enhancement to tonality or sharpness?

    If true , this is still good to know.

  3. #73

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    Re: 8x10 Scanning DIY for Epson scanners (v700/v750/v800/v850)

    Quote Originally Posted by 1erCru View Post
    The results do get better and better. Is this also true moving to 8x10?
    There are other factors to consider when evaluating a larger film format like 8x10.

    For equivalent angle of view from the same distance we need longer lenses which are generally lower in resolution. Longer lenses require smaller apertures to give equivalent depth of field. For example, given the identical subject-to-camera distance, a 150mm lens at f/22 has the same depth of field as a 300mm lens at f/45 or a 600mm lens at f/90.

    At smaller apertures we need either brighter light or longer exposures which may not be suitable for all subjects.

    For these and other reasons, when we go from 4x5 to 8x10 we don't simply double the resolution as we double the width of the film (or quadruple it as we quadruple the area).

    Even so, we get a lot of resolution.

  4. #74

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    Re: 8x10 Scanning DIY for Epson scanners (v700/v750/v800/v850)

    Quote Originally Posted by 1erCru View Post
    So even after downsampling there wouldn’t be enhancement to tonality or sharpness?

    If true , this is still good to know.
    35mm film has the same tonality than 8x10 if same development

    4x5 image quality is insane, 8x10 is an overkill for most applications

    But some 8x10 shots have a particular look from the defocus roll off, I'm addicted to that, IMHO the way depth is worked in 8x10 is so amazing,

    don't make the mistake to look throught a 8x10 ground glass (Jim). It's addictive...

  5. #75

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    Re: 8x10 Scanning DIY for Epson scanners (v700/v750/v800/v850)

    Yeah. I can see that. That photo is telling. I couldn’t crop in like that with my 4x5 scans.

  6. #76
    Steven Ruttenberg's Avatar
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    Re: 8x10 Scanning DIY for Epson scanners (v700/v750/v800/v850)

    How does this compare to wet scanning? I would place optical mylar over the 8x10 directly wet mounted to scan glass. Or you could use anr glass on top of negative as part of the wet scan mounting.

    I didn't look bit how far above the glass is the negative placed with the holder? Do you use the bar comes with scanner to invoke the lens for the 8x10 negative? My understandingbos that lens will cover full 8x10 and is focused at the scanner glass so mounting above could be an issue. Just inquiring.

    I tried the link but wasn't granted access.
    Last edited by Steven Ruttenberg; 1-Nov-2018 at 19:21.

  7. #77

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    Re: 8x10 Scanning DIY for Epson scanners (v700/v750/v800/v850)

    Steven, you can wet mount the 8x10 negative on the bed glass. This would be useful for an scratched negative. Other benefits are scarce, but this is 'à chacun son goût.

    A common issue when dry scanning on bed can be newton rings, but if the emulsion is facing to the glass we may not have to wet mount it. Another reason to wet mount on bed, in some cases, is ensuring perfect flatness (a rare curled sheet?)

    Wet mounting the negative won't damage the bed glass if taking some care, but in any case a replacement for the bed glass is quite cheap.

  8. #78
    Tin Can's Avatar
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    Re: 8x10 Scanning DIY for Epson scanners (v700/v750/v800/v850)

    If wet mounting can erase a scratch doesn't that imply an overall softening of a negative?

    Less sharp?



    Quote Originally Posted by Pere Casals View Post
    Steven, you can wet mount the 8x10 negative on the bed glass. This would be useful for an scratched negative. Other benefits are scarce, but this is 'à chacun son goût.

    A common issue when dry scanning on bed can be newton rings, but if the emulsion is facing to the glass we may not have to wet mount it. Another reason to wet mount on bed, in some cases, is ensuring perfect flatness (a rare curled sheet?)

    Wet mounting the negative won't damage the bed glass if taking some care, but in any case a replacement for the bed glass is quite cheap.
    Last edited by Tin Can; 1-Nov-2018 at 09:57.
    2022

  9. #79

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    Re: 8x10 Scanning DIY for Epson scanners (v700/v750/v800/v850)

    Quote Originally Posted by Randy Moe View Post
    If wet mounting can erase a scratch doesn't that imply an overall softening of a negative?

    Less sharp?
    Rany, no softening... because mounting fluid has similar refraction index than film it avoids the effect of the scratch without adding blur.

    Wet scans are equal or better than the dry ones, equal at least. If the film was curled then it can be clear benefit as flatness is ensured.

    Click image for larger version. 

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  10. #80
    Steven Ruttenberg's Avatar
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    Re: 8x10 Scanning DIY for Epson scanners (v700/v750/v800/v850)

    I find that when I wet mount my 4x5, I get much better scans, more even tones and colors and believe it or not they are crisper. I did quite a bit of dry scanning being somewhat apprehensive about wet scanning before trying wet scanning. Once I did, it was a no brainer to continue and forget dry scanning all together. For the Epson, you have to use the tape you get from distributor for Kami scan fluid and tape the scan glass edges to prevent the fluid from getting into the scanner. From there once wet mounted to the scan glass, I would lay the slightly oversized 8x10 ANR glass from better scanning on top of this. Seems to be good.

    I short, I doubt I will ever dry scan a negative again, even medium or 35mm format.

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