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The Space Between


d.s.

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I'm considering switching from dedicated film scanners to scanning with a digital camera, light pad, etc. Does anyone here know how much space between a film holder (the Flextights, for instance) and a light pad one should be aiming for to avoid picking up the texture of the latter's surface? And, does adding a slab of anti newton ring glass change that? If so, by how much?

 

Thanks,

Daniel

Edited by d.s.
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  • 2 weeks later...

My Epson flat-bed scanner's light source is essentially "a light pad" - large glowing LED-backlit panel to light the film from behind. Epson recesses theirs about 1 cm/0.5 inches behind the film, and I'd assume they know what they're doing. ;)

It should be noted that anti-newton-ring glass itself has an extremely small-scale texture or roughness of its own - microscopic "mountains" to prevent the glass and film touching all across their joined surfaces. It is scaled to be well below visual perception except as a slightly "frosted" or diffuse look in reflected light...

https://www.yoycart.com/Product/36586837075/

- but with enough camera/lens resolution, that texture may itself become visible. Shouldn't be a problem with most (< 36 Mpixel) cameras, unless one is cropping severely in-camera to a small part of the film.

Edited by adan
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