Re: [APML] New TP pictures

["joe" <jmize@svic.net>]

Duncan, I used to have that same 'single spike' on bright stars in my old 
10" LX-5 SCT too.  I'd guess it's something to do with either the corrector 
plate or the light baffel...joe  :)


"May You Go Among The Imperishable Stars"

Joe Mize:     jmize@svic.net
StarFields Observatory   http://www.cav-sfo.com
Chiefland, FL    29:24'33.4"N    82:51'37.7"W
Moon Phase:     http://tycho.usno.navy.mil/cgi-bin/phase.gif

----- Original Message ----- 
From: "Duncan Munro" <dmunro@sfu.ca>
To: "Discussion of Film Astrophotography" <astro-photo@seds.org>
Sent: Friday, March 18, 2005 1:42 AM
Subject: Re: [APML] New TP pictures


> You can't beat techpan for it's deepspace "mood".  I really enjoyed the 
> other techpan shots as well. I can't seem to find any info on David's 
> equipment. I'm really curious to know what mount he's using.
>
> Also,I wonder what is causing the single spike effect on  the bright star 
> in the M101 image. This effect is also present in the M81 image as well. I 
> am getting a similar "single spike" effect with my 10" SCT and I suspect 
> it may be caused by by dewzapper running at too high an amperage but maybe 
> someone has an alternate explanation?
>
> cheers
>
> Duncan
>
> GARY HATFIELD wrote:
>
>> Nice shots David!  I especially like the M101 image.  Can't help you on 
>> your question, I don't know either.
>>  Gary
>>
>>     ----- Original Message -----
>>     *From:* davidanna <mailto:davidanna@jazzfree.com>
>>     *To:* Discussion of Film Astrophotography
>>     <mailto:astro-photo@seds.org>
>>     *Sent:* Wednesday, March 17, 2004 3:09 PM
>>     *Subject:* [APML] New TP pictures
>>
>>     Hi list
>>      I have posted two new TP images from last new moon, I hope you
>>     enjoy them
>>     BTW does anyone know the difference between Substract and Absolute
>>     Difference making compositions with Picture Window?
>>      http://eureka.ya.com/astrophoto/new.htm
>>      David Gimenez i Rocamora
>>     Corbera de Llobregat
>>     mailto:davidanna@jazzfree.com
>>     http://eureka.ya.com/astrophoto/index.htm
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