Re: [APML] The next great scanner?

["Matthias Felsch" <mfonline@gmx.net>]

"Ray Butler" <ray.butler@nuigalway.ie> wrote:

> When scanning slide films, whenever there is a star on a dark background ("dark" meaning somewhere
> at or above the rebate density, but somewhat less than the sky fog limit), there is a faint little
> 'trail' or 'ghost spot' left on both sides of the star image. .....
> .......
> Has anyone else noticed this effect?

I once tested a Minolta Multi Pro, which had similiar ghost effects, but
I think they were stronger than the ones you describe.
Each brighter star had a rainbow- like ghost reflection nearby.
Minolta Japan did find out that the reason was a glass plate
positioned in front of the ccd- sensor to protect it.
This glass was NOT coated.... <g>
When they modified this particular scanner with a coated glass, the
ghosts were reduced by 95 %. The remaining 5% were tolerable in my opinion.
Unfortunately the scanner had a second flaw, so it was returned...

Regards
Matthias

www.mfelsch.de/astro/index.html







>
> Ray "who nonetheless considers the Epson 3200 to have been a great buy at the time" Butler
>
>
> Kevin McCarthy wrote:
>
>> Canon has just released their 9950F flatbed scanner, which will accept a whole roll of 35 mm, and
>> two strips of 120 format.  They claim that it is so good that they are discontinuing their line
>> of dedicated film scanners.  In the flatbed realm, the current best model seems to be the Epson
>> 4870, which has been favorably compared to dedicated Nikon MF film scanners.  I would like to
>> hear any opinions as to how the new 9950F and year-old 4870 compare.  Curiously, Canon does not
>> mention a Dmax value.  An initial review of the 9950F is here, although he (Vincient Olivier)
>> plans to follow up with an in-depth review shortly:
>>
>> http://www.photo-i.co.uk/News/Sept04/Canon%20scanner.htm
>>
>> He has an in depth review of the current champion Epson 4870 at:
>>
>> http://www.photo-i.co.uk/Reviews/interactive/Epson%204870/page_1.htm
>>
>> Here is some info from Canon:
>>
>> http://consumer.usa.canon.com/ir/controller?act=ModelDetailAct&fcategoryid=120&modelid=10446 I
>> did see some grousing on a German site that the Canon software is "too automatic", also some
>> concern that third party software such as Digital Ice and SilverFast may take a while to be
>> available for this scanner.
>> It may still be too early to tell if this has a real performance edge over the 4870.  Being in
>> the market for a MF scanner, it caught my interest.  On another note, Nikon LS-8000 can be had
>> for ~ $1500 if you are willing to buy a refurb, more like ~2000 otherwise.  Opinions, anyone?
>>
>> Kevin McCarthy
>>
>> _______________________________________________
>> Astro-Photo mailing list
>> Astro-Photo@seds.org
>> http://seds.org/mailman/listinfo/astro-photo
>
> -- 
> Dr. Ray Butler (ray.butler@nuigalway.ie || ray@physics.nuigalway.ie)
> Lecturer, Dept. of Physics || Computational Astrophysics Laboratory
> National University of Ireland, Galway, University Road, Galway, Ireland.
> Tel: +353-91-524411 ext. 3788   FAX: +353-91-525700
>
> _______________________________________________
> Astro-Photo mailing list
> Astro-Photo@seds.org
> http://seds.org/mailman/listinfo/astro-photo
>

_______________________________________________
Astro-Photo mailing list
Astro-Photo@seds.org
http://seds.org/mailman/listinfo/astro-photo