[Author Prev][Author Next][Thread Prev][Thread Next][Author Index][Thread Index]
Re: [APML] I Shot the Dog!?!
Steve, the spikes are definitely caused by the diaphragm vanes where
they meet at an angle.
Stuart
http://www3.sympatico.ca/stuart.j.heggie/Stuart.J.Heggie/
Flesherton, Ontario, Canada
----- Original Message -----
From: "Steve Lindsey" <stevelindsey@earthlink.net>
To: "Discussion of Film Astrophotography" <astro-photo@seds.org>
Sent: Saturday, March 27, 2004 10:59 AM
Subject: Re: [APML] I Shot the Dog!?!
> Hi Scott. The spikes were in the unfiltered shots as well and must
just be
> the slight shape of the aperture stopped down an notch diffracting the
light
> on the brightest stars. It'd be an interesting comparison to see one
of
> these wide open but these lenses aren't supposed to be that great
unless
> stopped a bit (and I kind of like the spikes - <g>). Thanks.
>
> Steve
>
>
> > Steve,
> > It's hard to tell with my laptop, but it looks like a good shot to
me.
> Very
> > nice diffraction spikes around Sirius, was that a result of the
filter or
> > was it present in the unfiltered shots. My Canon FD 135 gives
similar
> spikes
> > without a filter. The new website layout looks really good.
> >
> >
> > Scott Hammonds
> > www.creatorsview.com
> >
> > -----Original Message-----
> > From: astro-photo-bounces@seds.org
[mailto:astro-photo-bounces@seds.org]
> On
> > Behalf Of Steve Lindsey
> > Sent: Saturday, March 27, 2004 1:19 AM
> > To: APML
> > Subject: [APML] I Shot the Dog!?!
> >
> > Well... at least I got your attention! <g> Here's a simple
widefield of
> > Canis Major I finally finished processing from last month's outing.
Hope
> > you enjoy.
> >
> > http://home.earthlink.net/~stevelindsey/Canis.htm
> >
> > Comments appreciated as always.
> >
> > Steve
> >
> >
> > _______________________________________________
> > Astro-Photo mailing list
> > Astro-Photo@seds.org
> > http://seds.org/mailman/listinfo/astro-photo
> >
> >
> >
> >
> > _______________________________________________
> > Astro-Photo mailing list
> > Astro-Photo@seds.org
> > http://seds.org/mailman/listinfo/astro-photo
> >
>
>
> _______________________________________________
> Astro-Photo mailing list
> Astro-Photo@seds.org
> http://seds.org/mailman/listinfo/astro-photo
>
_______________________________________________
Astro-Photo mailing list
Astro-Photo@seds.org
http://seds.org/mailman/listinfo/astro-photo