That makes a lot of sense, and seems to equate to what I saw in the "stars"
test (viz pinholes in black leader). Different scanners appear to show
different results, but *some* haloing seems to be universal, in all the
tests I've seen.
I'd like to be proven wrong on this one, if anyone has better answers.
Best regards--LRA
>
>At 5:06 am -0400 6/6/01, IQ3D@aol.com wrote:
>>using the LS2000 for some time now and have been very pleased
>>with the results. Just recently however we have put through a batch of
>>slides
>>with subjects against black backgrounds. The scans have all got a hazy
>>halo
>>round all the bright areas
>
>
>I doubt that it's flare from dust or stuff (but you could give it a
>good blast with canned air to see). I've seen this with my LS2000
>too. It happens where there are large light areas next to black. The
>best explanation that I've heard is a kind of electronic flare - CCD
>cells reaching a high enough voltage when strongly illuminated to
>induce a higher voltage in their neighbours. Being as the neighbours
>should be reporting near zero output for black even a small boost is
>significant. Maybe the processing makes it worse.
>
>I've found a high bit multipass scan (best with Vuescan but
>Silverfast's almost as good) & careful Photoshop the only way to fix
>it.
>
>David Hoffman
>--
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>
> phone +44 (0)20 8981 5041 fax +44 (0)20 8980 2041
>
>David Hoffman will be away from 16 June 2001 until 1 July 2001.
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