Re: [APML] The next great scanner?

[Duncan <dmunro@sfu.ca>]

I have a similar problem with ghosting around bright stars with my 
Minolta dual scan 2. It goes away if I do a multi-pass scan and use a 
more precise focus.


cheers


Duncan

Lane, Jason R wrote:

>Hi guys,
>
>This exactly describes the issue I have with my HP Photosmart s20...little rainbow-like ghost reflection nearby.  Uncoated optics, for sure.
>
>-----Original Message-----
>From: astro-photo-bounces@seds.org
>[mailto:astro-photo-bounces@seds.org]On Behalf Of Matthias Felsch
>Sent: Monday, October 04, 2004 6:34 AM
>To: Discussion of Film Astrophotography
>Subject: Re: [APML] The next great scanner?
>
>
>
>"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
>
>
>
>
>
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>
>  
>
>>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
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>>http://seds.org/mailman/listinfo/astro-photo
>>
>>    
>>
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