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[filmscanners] Re: Black and white scans on LS4000 EDandotherissues



What is somewhat interesting about this is that of all the CCD scanners
on the market (excepting the Leaf, as noted) Nikon is probably best set
up to do a real B&W scan.  Unlike most which use a triline CCD sensor
with a R, G or B color separating filter for each line, the Nikon
doesn't use color separating filters on the CCD, but rather uses colored
LEDs to produce the separations and a one line sensor (with all but the
LS8000)

It seems to me that they could have produced something approaching white
light by firing all LEDS at once with a diffuser, and read the neg using
the one bare CCD sensor line.  I think they would then have a bit more
brightness to work from, if required.

Art


Austin Franklin wrote:

>>>I remain disappointed that they state you cannot scan black and
>>>
>>white as RGB
>>
>>>positive, even intimating that one would be manipulating a
>>>
>>lesser quality
>>
>>>scan in Photoshop than if the scan had been done as a
>>>
>>monochrome scan.  That
>>
>>What they say is definitely not true. The scanner allows you to set
>>the exposures separately and read out the raw CCD data, so all
>>limitations they might be thinking of arise from the design of the
>>scan software.
>>
>
> Hi Andras and Simon,
>
> ALL CCD scanners that I know of, with the exception noted in the next
> sentence, scan EVERYTHING in RGB, whether you select B&W/Monochrome or not.
> The ONLY CCD scanner(s) I know of that scan B&W AS B&W, using a single ND
> filter, is the Leafscan 45 and the Leafscan 35.
>
> So, the point is, you ARE scanning the B&W film in RGB, just the scanner has
> it's own "mix" of RGB that it uses to convert internal to the scanner and
> then give you the monochrome image.  EXACT same thing that PS does when you
> convert from RGB to B&W, but in PS, I believe you can change the "mix" of R
> G and B.  I REALLY wish scanner manufacturers would make their
> scanner/software so that you could change the mix there too...
>
> Personally, I believe the Leaf gives much better B&W tonality than any other
> CCD scanner I've ever used or seen.
>
> Austin
>
>
>


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