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RE: [APML] Diffraction spikes with a refractor

John,

> Here's a hypered RG200 shot of the Pleiades showing the spikes:
> http://people.ne.mediaone.net/jeboud/m45.htm

That's a nice one.  More evidence of RG200's potential, and I think more
validation of the 2-hour/50C recipe (I assume you stuck with that for this
shot).  BTW, it looks like I've settled on 1.5 hours for SHQ100 at 50C in
the cannister, then expose 30 minutes at f/4 - my first impressions of M31
scans with this recipe are encouraging. 

> This should leave all you Newtonian guys out there with big grins  :o)

Got a little reflector envy, have you?  Do you get doubled spikes when
you're out of focus?M45 is certainly one target that I personally think
looks better with diffraction spikes.  Jupiter, on the other hand...

Sincerely,
Jon Kolb
Adventures in Astrophotography
http://home.datawest.net/jkolb/
jkolb@mindport.com

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