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

["Arthur Entlich" <artistic-1@shaw.ca>]

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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