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ASTRO: Splitting the 658.4 [NII] line from the 656.4 Halpha line



 
 
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  #1  
Old November 26th 06, 11:01 AM posted to alt.binaries.pictures.astro
Richard Crisp[_1_]
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Default ASTRO: Splitting the 658.4 [NII] line from the 656.4 Halpha line

the Custom Scientific 3nm FWHM filters were confirmed tonight to split the
very close emission lines of the [NII] doublet at 658.4 nm and the Halpha
line at 656.4 nm.

I used the 450mm f/12.6 classical cassegrain with the Lumicon GEG reducer in
the rearmost position for an effective focal ratio of f/7.1

Exposures were 20 minutes binned 2x2 using the FLI Maxcam10 at 3366mm focal
length (0.84 arc-sec/pixel)

It is clear that the filters will in fact separate those two very closely
spaced emission lines.





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  #2  
Old November 26th 06, 06:25 PM posted to alt.binaries.pictures.astro
Rick Johnson[_2_]
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Posts: 3,085
Default ASTRO: Splitting the 658.4 [NII] line from the 656.4 Halpha line

High resolution in more ways than one!

Rick


Richard Crisp wrote:

the Custom Scientific 3nm FWHM filters were confirmed tonight to split the
very close emission lines of the [NII] doublet at 658.4 nm and the Halpha
line at 656.4 nm.

I used the 450mm f/12.6 classical cassegrain with the Lumicon GEG reducer in
the rearmost position for an effective focal ratio of f/7.1

Exposures were 20 minutes binned 2x2 using the FLI Maxcam10 at 3366mm focal
length (0.84 arc-sec/pixel)

It is clear that the filters will in fact separate those two very closely
spaced emission lines.





  #3  
Old November 26th 06, 07:50 PM posted to alt.binaries.pictures.astro
Stefan Lilge
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Posts: 2,269
Default ASTRO: Splitting the 658.4 [NII] line from the 656.4 Halpha line

Quite amazing that two lines so close together give such a different view.
And a very nice picture btw.

Stefan

"Richard Crisp" schrieb im Newsbeitrag
...
the Custom Scientific 3nm FWHM filters were confirmed tonight to split the
very close emission lines of the [NII] doublet at 658.4 nm and the Halpha
line at 656.4 nm.

I used the 450mm f/12.6 classical cassegrain with the Lumicon GEG reducer
in the rearmost position for an effective focal ratio of f/7.1

Exposures were 20 minutes binned 2x2 using the FLI Maxcam10 at 3366mm
focal length (0.84 arc-sec/pixel)

It is clear that the filters will in fact separate those two very closely
spaced emission lines.





  #4  
Old November 27th 06, 06:14 AM posted to alt.binaries.pictures.astro
Jon Christensen
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Posts: 40
Default ASTRO: Splitting the 658.4 [NII] line from the 656.4 Halpha line

Nice comparison, Richard. As I have mentioned before I like C.S. filters
and would rather use them compared to the competition.


Jon Christensen

"Richard Crisp" wrote in message
...
the Custom Scientific 3nm FWHM filters were confirmed tonight to split the
very close emission lines of the [NII] doublet at 658.4 nm and the Halpha
line at 656.4 nm.

I used the 450mm f/12.6 classical cassegrain with the Lumicon GEG reducer
in the rearmost position for an effective focal ratio of f/7.1

Exposures were 20 minutes binned 2x2 using the FLI Maxcam10 at 3366mm
focal length (0.84 arc-sec/pixel)

It is clear that the filters will in fact separate those two very closely
spaced emission lines.






  #5  
Old November 27th 06, 04:08 PM posted to alt.binaries.pictures.astro
Richard Crisp[_1_]
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Posts: 985
Default ASTRO: Splitting the 658.4 [NII] line from the 656.4 Halpha line


"Jon Christensen" wrote in message
...
Nice comparison, Richard. As I have mentioned before I like C.S. filters
and would rather use them compared to the competition.



I have sold my Astrodons and am quite happy that they are gone now. They
have been OK in some ways but in my view they are overpriced and
underperform the competition from Custom Scientific.




Jon Christensen

"Richard Crisp" wrote in message
...
the Custom Scientific 3nm FWHM filters were confirmed tonight to split
the very close emission lines of the [NII] doublet at 658.4 nm and the
Halpha line at 656.4 nm.

I used the 450mm f/12.6 classical cassegrain with the Lumicon GEG reducer
in the rearmost position for an effective focal ratio of f/7.1

Exposures were 20 minutes binned 2x2 using the FLI Maxcam10 at 3366mm
focal length (0.84 arc-sec/pixel)

It is clear that the filters will in fact separate those two very closely
spaced emission lines.








  #6  
Old November 28th 06, 10:25 AM posted to alt.binaries.pictures.astro
KLM
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Posts: 4
Default ASTRO: Splitting the 658.4 [NII] line from the 656.4 Halpha line

Im laughing. I always do in the neighborhood of Pefection.
Richard, congrats on this breakthrough.
Jerry




Richard Crisp wrote:

the Custom Scientific 3nm FWHM filters were confirmed tonight to split the
very close emission lines of the [NII] doublet at 658.4 nm and the Halpha
line at 656.4 nm.

I used the 450mm f/12.6 classical cassegrain with the Lumicon GEG reducer in
the rearmost position for an effective focal ratio of f/7.1

Exposures were 20 minutes binned 2x2 using the FLI Maxcam10 at 3366mm focal
length (0.84 arc-sec/pixel)

It is clear that the filters will in fact separate those two very closely
spaced emission lines.

[Image]


  #7  
Old November 29th 06, 02:52 AM posted to alt.binaries.pictures.astro
George Normandin[_1_]
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Posts: 1,022
Default ASTRO: Splitting the 658.4 [NII] line from the 656.4 Halpha line

"Richard Crisp" wrote
...
the Custom Scientific 3nm FWHM filters were confirmed tonight to split the
very close emission lines of the [NII] doublet at 658.4 nm and the Halpha
line at 656.4 nm........


Richard,

Interesting image and I'm glad to hear that the filters 'work'.

......now if CS could just figure out how to lower the price........


George N


  #8  
Old November 29th 06, 07:14 AM posted to alt.binaries.pictures.astro
Richard Crisp[_1_]
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Posts: 985
Default ASTRO: Splitting the 658.4 [NII] line from the 656.4 Halpha line


"George Normandin" wrote in message
news
"Richard Crisp" wrote
...
the Custom Scientific 3nm FWHM filters were confirmed tonight to split
the very close emission lines of the [NII] doublet at 658.4 nm and the
Halpha line at 656.4 nm........


Richard,

Interesting image and I'm glad to hear that the filters 'work'.

......now if CS could just figure out how to lower the price........



well they are significantly lower in price than the AstroDon equivalent. I
think they are better too.

I like it when better is significantly cheaper




George N



 




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