Re: [APML] A long time lurker - Finally sharing some of my astrophotos...

[Sean Walker <vze2c3z8@verizon.net>]

if it's the nikon, it's definately offset illumination. Lots of issues with those, but a few work
ok that I hear.

Sean Walker

Michael Greger wrote:

> I would like to know too!  It is a prime focus shot, no telecompressors,
> flattners, or filters.  I can't see the blue ghosts on the film on my
> light box.  In fact, there are stars behind some of the ghosts that I
> can see on film, but not on the scanned image.  In addition, the stars
> are somewhat bloated in the scanned images.  The film is a bit sharper.
>
> I have to lean towards the scanner itself.  BTW, I just noticed that I
> lied about which scanner it was...  I will have to fix this - sorry for
> the misinformation.  I used a Nikon 4000ED to scan the images from
> OSP2001.  This includes the the NGC891 and M27 shots which show the
> ghosts.  The ghosts also show up on the M15 shot (different film, same
> scanner).
>
> This is the first and only time I have used this scanner.  Normally, I
> do use the Polaroid SS4000, but I wanted to try the new Nikon gear.  I
> was not impressed overall.  I had a great deal of trouble with daytime
> shots as well.  Perhaps the scanner was malfunctioning, perhaps it was
> my inexperience with the scanner, maybe it is simply not as good as the
> SS4000...  But, I will probably not use it again.  I will have to try to
> rescan some of these next time I rent the Polaroid.
>
> Mike
>
> Chris1011@aol.com wrote:
>
> > In a message dated 10/8/2001 10:11:39 PM Pacific Daylight Time,
> > mgreger@dashmail.net writes:
> >
> >
> >
> >> I am most
> >> proud of some of my more recent images taken at the 2001 Oregon Star
> >>
> >> Party:
> >>
> >> ttp://rc1s3p9.dashmail.net/~mgreger/astro/gallery/Deepsky/Messier/M27/M27-2350mm/index.html
> >
> > I would be interested to know what is the cause of the faint blue
> > ghost images of the stars on the periphery of the image. You have
> > listed that it is a prime focus shot. I would have thought that it
> > might be due to some telecompressor optic or field flattener glass
> > just before the film plane.
> >
> > Roland Christen
>
> --
> -----------------------------------------------------------------------------
> Michael J Greger                   Intel Corporation
> mgreger@dashmail.net               Intel Server Chipset Design Engineer
> http://www.geocities.com/mjgreger0 These are my opinions, not those of Intel!
> -----------------------------------------------------------------------------
>
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