Re: [APML] M27 and Dwarf Nova

[Jerry Lodriguss <lists4@astropix.com>]

Hi Stuart,

Thanks.

I wish Canon would have just done it the right way and passed as much 
h-alpha through that filter that they could, instead of compromising so the 
camera could still be used in the daytime.

But it's not bad considering it was from my driveway with all the light 
pollution here.

It's interesting to compare it to my previous effort on M27 taken on film here:

http://www.astropix.com/HTML/E_SUM_N/M27.HTM

The DSLR version is apparently a bit more accurate color wise, at least 
according to Don Goldman and his article in Sky and Telescope (which is the 
bible as far as I am concerned).

The green OIII stuff in the nebula is supposed to be "teal" colored... not 
blue... not green... teal!

Jerry


At 08:29 PM 8/24/2005, you wrote:
>Jerry, what a beautiful shot! 90 minutes at F8 - that is a pretty darn 
>good signal to get all three channels in that time at that f-ratio. That 
>camera is living up to the promise.
>
>Stuart
> >
> > From: Jerry Lodriguss <lists4@astropix.com>
> >
> > Hi Yall,
> >
> > I've just posted an image that I took Tuesday morning of M27 which 
> happened
> > to include the newly discovered Dwarf Nova. I didn't know about the nova
> > when I took the picture.
> >
> > It's at:  http://www.astropix.com/HTML/M_DAP/M013/M013.HTM
> >
> > This is "second light" with the Canon 20Da. It's a composite of 90
> > sixty-second exposures at ISO 800 with the Astro-Physics 130 EDT f/8.
> >
> > Images were calibrated, averaged and digitally developed in Images Plus.
> > Color adjustments were done in Photoshop. Vignetting correction by
> > GradientXTerminator. Noise reduction by Noise Ninja.
> >
> > Jerry







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