Re: [APML] New image of Jupiter & M44

["Chris Cook" <ccjd@ix.netcom.com>]

The Tak has numerous light baffles in the tube.  After thinking about it
some more, I think I might know what it is.... if you look at the objective
from the front, there are three very small sliver rectangles evenly spaced
around the very edge of the objective cell..... I'm guessing these are some
sort of spacers?  Anyone here know if that's what they are?  This is just a
wild guess.....

The other idea is that its the f/6 reducer.

Chris

----------------------------------
Chris Cook
Astronomical & Nightscape Photography
www.abmedia.com/astro

-----Original Message-----
From: Chris Schur <cschur@cybertrails.com>
To: Discussion of Film Astrophotography <astro-photo@seds.org>
Date: Tuesday, May 13, 2003 8:13 AM
Subject: Re: [APML] New image of Jupiter & M44


>Either the hexagonal (or whatever it is) shaped iris, or some internal
light
>baffle.  Ive seen the effect as well on very low quality highly astigmatic
>lenses, but I think in this case, that is not it.  Just some ideas.
>
>Chris
>Astrophotograpy site: http://www.PSIAZ.com/schur/astro/index.html
>
>----- Original Message -----
>From: Chris Cook <ccjd@ix.netcom.com>
>To: Discussion of Film Astrophotography <astro-photo@seds.org>
>Sent: Monday, May 12, 2003 8:51 PM
>Subject: Re: [APML] New image of Jupiter & M44
>
>
>> Hi Chris -
>>
>> What do you mean by internal stop?
>>
>> Chris
>>
>> ----------------------------------
>> Chris Cook
>> Astronomical & Nightscape Photography
>> www.abmedia.com/astro
>>
>> -----Original Message-----
>> From: Chris Schur <cschur@cybertrails.com>
>> To: Discussion of Film Astrophotography <astro-photo@seds.org>
>> Date: Monday, May 12, 2003 10:35 PM
>> Subject: Re: [APML] New image of Jupiter & M44
>>
>>
>> >Chris, I suspect it is due to the shape of the internal stop on the
lens.
>> >
>> >Chris
>> >Astrophotograpy site: http://www.PSIAZ.com/schur/astro/index.html
>> >
>> >----- Original Message -----
>> >From: Chris Cook <ccjd@ix.netcom.com>
>> >To: <astro-photo@seds.org>
>> >Sent: Monday, May 12, 2003 6:50 PM
>> >Subject: [APML] New image of Jupiter & M44
>> >
>> >
>> >> Hi all -
>> >> Here's a quick shot of Jupiter/M44 I snagged a few weeks ago.
>> >>
>> >> http://www.abmedia.com/astro/current/m44-jupiter.html
>> >>
>> >> Does anyone know what causes those wide dark lines that radiate from
>> >> Jupiter?  I've seen them in other images done with other scopes where
a
>> >very
>> >> bright star is within the FOV.  They don't bother me, I'm just
curious.
>> >> Actually, I think it adds to the image.
>> >> Comments welcome.
>> >> Enjoy.
>> >>
>> >> Chris
>> >>
>> >> ----------------------------------
>> >> Chris Cook
>> >> Astronomical & Nightscape Photography
>> >> www.abmedia.com/astro
>> >>
>> >>
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>> >>
>> >
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