Re: [APML] New image of Jupiter & M44

[Stephen Pitt <lthuedk@pe.net>]

Thanks Jim!  I hope the Fuji p100f sticks around a while.

Stephen

Jim Ives wrote:
> Stephen you have some really nice Rho shots on your site!
> Jim Ives
> ----- Original Message -----
> From: "Stephen Pitt" <lthuedk@pe.net>
> To: "Discussion of Film Astrophotography" <astro-photo@seds.org>
> Sent: Tuesday, May 13, 2003 11:44 AM
> Subject: Re: [APML] New image of Jupiter & M44
> 
> 
> 
>>Hi Chris.  I have an instance where the dark ray appears on one
>>(Alnitak) of three stars of nearly the same magnitude, and where there
>>are no spacers as you describe in the lens.
>>
>>http://www.light-to-dark.com/orion_blt_swd.html
>>
>>I've seen irregularities in Alnitak's rays before with other instruments.
>>
>>On your lens: How is your new 102/f.f. combo performing?  Are you
>>getting full field correction and illumination with the 51mm f.f.?
>>
>>Best regards,
>>
>>Stephen Pitt
>>
>>Chris Cook wrote:
>>
>>>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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>>>>>
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