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Digital BW, The Print

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RE: [Digital BW] Excessive grain in scanned images

2002-01-26 by Austin Franklin

> I had some of these negatives scanned by a bureau through an
> Imacon Flextight machine


> I understand the problem. Light in a scanner is highly collimated -
> the light beams are nearly perfectly parallel. So the grains don't
> just block the light - they scatter it creating greater apparent
> density. The so-called "Callier Effect."

Hum...  I believe the light source in the Imacon is a diffuse light source
(OSRAM L 8W/12-950 Lumilux De Luxe Daylight 5400K lamp), not a point light
source?  If so, that is to your advantage!  It wouldn't be "parallel" light
(as you call it), but diffuse...and I believe the effect would be the
opposite you are talking about.

Austin

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