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#1
April 19th 10, 04:16 AM
posted to alt.binaries.pictures.astro
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ASTRO: M17 widefield halpha high resolution
here is M17 in Halpha taken with the AP155EDF f/7 with the PL39KM camera
using the FLI Research Grade halpha filter http://www.narrowbandimaging.com/m17...ch_ha_page.htm it is only 3.5 hours of exposure but it is starting to shape up 
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#2
April 19th 10, 04:37 AM
posted to alt.binaries.pictures.astro
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ASTRO: M17 widefield halpha high resolution
On 4/18/2010 10:16 PM, Richard Crisp wrote:
here is M17 in Halpha taken with the AP155EDF f/7 with the PL39KM camera using the FLI Research Grade halpha filter http://www.narrowbandimaging.com/m17...ch_ha_page.htm it is only 3.5 hours of exposure but it is starting to shape up Is the camera red sensitive? it did well for that exposure time in H alpha. Even the fainter parts of the nebula look smoother than I'd have expected. Rick -- Correct domain name is arvig and it is net not com. Prefix is correct. Third character is a zero rather than a capital "Oh".
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#3
April 19th 10, 05:14 AM
posted to alt.binaries.pictures.astro
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ASTRO: M17 widefield halpha high resolution
"Rick Johnson" wrote in message . com... On 4/18/2010 10:16 PM, Richard Crisp wrote: here is M17 in Halpha taken with the AP155EDF f/7 with the PL39KM camera using the FLI Research Grade halpha filter http://www.narrowbandimaging.com/m17...ch_ha_page.htm it is only 3.5 hours of exposure but it is starting to shape up Is the camera red sensitive? it did well for that exposure time in H alpha. Even the fainter parts of the nebula look smoother than I'd have expected. I haven't measured it but Kodak says QE of 20% at 656nm
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#4
April 21st 10, 08:42 PM
posted to alt.binaries.pictures.astro
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ASTRO: M17 widefield halpha high resolution
Richard,
another very good picture. I hope you don't run out of webspace too soon ;-) Stefan "Richard Crisp" schrieb im Newsbeitrag m... here is M17 in Halpha taken with the AP155EDF f/7 with the PL39KM camera using the FLI Research Grade halpha filter http://www.narrowbandimaging.com/m17...ch_ha_page.htm it is only 3.5 hours of exposure but it is starting to shape up
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#5
April 21st 10, 08:45 PM
posted to alt.binaries.pictures.astro
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ASTRO: M17 widefield halpha high resolution
I haven't measured it but Kodak says QE of 20% at 656nm Well, that sounds pretty much like a KAI 11000 ;-) Stefan
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#6
April 22nd 10, 07:42 PM
posted to alt.binaries.pictures.astro
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ASTRO: M17 widefield halpha high resolution
On 4/21/2010 2:45 PM, Stefan Lilge wrote:
I haven't measured it but Kodak says QE of 20% at 656nm Well, that sounds pretty much like a KAI 11000 ;-) Stefan Actually it is "far" more sensitive than that. All the way up to just a bit above 30%. One reason I have so much trouble bringing out HII regions in galaxies. Rick -- Correct domain name is arvig and it is net not com. Prefix is correct. Third character is a zero rather than a capital "Oh".
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