[filmscanners] RE: Re:digitising slides

["Jack Phipps" <JPhipps@asf.com>]

Guten Tag Rob!
As a matter of fact our chief scientist has done just that.

Here is an excerpt from someone asking a similar question on another forum:

If the exposures are equal, you want to average them equally.  In layers
this means the bottom should be 100% and the next 50%.  Now the third should
be 33% so that you see 1/3 of that layer, and 2/3 of half of each below, do
the math, exactly 1/3 of all three.  Fourth layer should be 1/4 or 25%,
fifth should be 1/5...  17th should be 1/17.

Be very careful.  I use a "big'ol" tripod, set the D100 to pre-mirror-up
with time delay, and a remote shutter release and even then it is VERY hard
to hold sub-pixel alignment.  Don't try this with a telephoto lens or
outside in the wind.

I use this to scan slides.  I have the D100 set to bracket three exposures
at the widest range, and a Bessler colorhead with diffuse illumination.  I
piece the three exposures together in a PS script to get a density range
that would make a drum scanner blush.  Scans as fast as you can hit the
shutter release 3 times.  Use this technique when you need to capture a
brightness range outside the ability of your digital camera.

End of excerpt.

As you can see, he takes three pictures of each slide to give him the
quality he wants.

I hope this helps!

Jack Phipps
Applied Science Fiction

-----Original Message-----
From: Op's

has anyone done a comparison on copying a slide with a digital camera
say Nikon D100 60mm macro lens (6Mp 17M tiff file) with scanning it to a
file with a film scanner?

I was thinking of putting all my old slides to CD and a film scanner
would take too long

has anyone used this method and how do the results compare?

Thanks

rob

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