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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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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. |
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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. |
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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. |
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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. |
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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
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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
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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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