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ASTRO: Widefield North American Nebula/Pelican/IC5068 in [SII], Ha and [OIII]
"George Normandin" wrote in message ... "Richard Crisp" wrote here are two different palettes used for the Na Nebula/Pelican IC5068 complex. http://www.rdcrisp.darkhorizons.org/...c5068_page.htm This is widefield shot of 9 square degrees taken with a horribly undersampled FLI Dream Machine used on an AP Traveler with a 0.75x telecompressor. The effective focal length was close to 475mm which results in a plate scale of 10.5 arc-sec/pixel......... That's a very interesting pair of images Richard! Have you tried 'narrow-band' filters and a full spectrum Luminance image? No I have not done that. One thing I have done is to combine (sum) the three emission line band data and use that for luminance. For such wide-field images I think your image scale is just fine. I've used a ST-6 on an 80mm Brandon triplet and I'm happy with the results. You might get more resolution using the DRIZZLE method, but I'm not sure that it would matter much considering the fine results you already have. George Normandin Those images were really intended more as "survey" images: I get 9 square degrees and can shoot three shots of five minutes each through each of five filters and get an image done in a bit more than an hour. That lets me decide what objects are "interesting" and warrant a more detailed examination later. I was shooting four such tricolor survey images per night when I did these back in October. Turns out some of the images were pretty good as is. That surprised me. |
#12
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ASTRO: Thor's Helmet in Halpha
Richard,
Thank you very much for the comment. It means a lot to me. I'm blushing g! Thanks for your kind comments ... I have been 'following' your recent work from your posts on the APML. Those narrow band false color images are very impressive ... and you can do them from a light polluted area! Outstanding work! -- Marty Martin C Germano http://home.earthlink.net/~mcgermano |
#13
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ASTRO: Thor's Helmet in Halpha
Hello, Martin C. Germano,
I am glad to see you posting here. Stay with us. I have admired your astrophotos for many years, several decades in fact. Very fine work. If Your web page is very helpful and informative. Clear skies, Bill Meyers Martin C Germano wrote: I did not get but one hour's worth of Ha for Thor but did assemble it into a sample shot: sort of an early look-see at what may be in store. I like that one Richard ... very reminiscent of a Tech Pan image. -- Marty Martin C Germano http://home.earthlink.net/~mcgermano |
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Q ASTRO: Thor's Helmet in Halpha
"Martin C Germano" wrote in message hlink.net... Richard, Thank you very much for the comment. It means a lot to me. I'm blushing g! Thanks for your kind comments ... I have been 'following' your recent work from your posts on the APML. Those narrow band false color images are very impressive ... and you can do them from a light polluted area! Outstanding work! -- Marty Martin C Germano Again thanks, Marty. From my perspective once I got started using the emission line filters, they are sort of the only option from a light polluted suburban backyard. It seems like all I otherwise do is to try to remove gradients. Two tradeoffs: slower exposures, weird colors. on the former, the big pixels and high QE of the Dream Machine helps with exposure length. On the latter, I have sort of tired of red objects and sort of welcome a new set of colors. Besides those colors seem fine coming from the Hubble, so why not? Best regards Richard |
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ASTRO: Widefield North American Nebula/Pelican/IC5068 in [SII],Haand [OIII]
not for this user there isn't
Chosp wrote: "News" wrote in message ... is there supposed to be an image on this link? http://www.rdcrisp.darkhorizons.org/...c5068_page.htm There is - and it is quite a good one. |
#16
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ASTRO: Widefield North American Nebula/Pelican/IC5068 in [SII],Haand [OIII]
On 01/08/04 09:44 +0900, News wrote:
not for this user there isn't Chosp wrote: "News" wrote in message ... is there supposed to be an image on this link? http://www.rdcrisp.darkhorizons.org/...c5068_page.htm There is - and it is quite a good one. His images are some of my favourite and this link (NGC7000/IC5070/IC5068 Widefield) is absolutely stunning. If you can't see things, you should check your browser. Ya gots ta be able to see frames. trane -- //------------------------------------------------------------ // Trane Francks Tokyo, Japan // Practice random kindness and senseless acts of beauty. |
#17
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ASTRO: Thor's Helmet in Halpha
Bill,
I am glad to see you posting here. Stay with us. I've been reading and occasionally posting here for years ... just seems like *most* of what goes on here is not 'up my ally'. -- Marty Martin C Germano http://home.earthlink.net/~mcgermano |
#18
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ASTRO: Widefield North American Nebula/Pelican/IC5068 in [SII],Haand [OIII]
netscape 7.1??? oughta work...BUT IT DOESN'T
Trane Francks wrote: On 01/08/04 09:44 +0900, News wrote: not for this user there isn't Chosp wrote: "News" wrote in message ... is there supposed to be an image on this link? http://www.rdcrisp.darkhorizons.org/...c5068_page.htm There is - and it is quite a good one. His images are some of my favourite and this link (NGC7000/IC5070/IC5068 Widefield) is absolutely stunning. If you can't see things, you should check your browser. Ya gots ta be able to see frames. trane |
#19
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ASTRO: Widefield North American Nebula/Pelican/IC5068 in [SII],Haand [OIII]
oh by the way, other links from this site do have work for me
Trane Francks wrote: On 01/08/04 09:44 +0900, News wrote: not for this user there isn't Chosp wrote: "News" wrote in message ... is there supposed to be an image on this link? http://www.rdcrisp.darkhorizons.org/...c5068_page.htm There is - and it is quite a good one. His images are some of my favourite and this link (NGC7000/IC5070/IC5068 Widefield) is absolutely stunning. If you can't see things, you should check your browser. Ya gots ta be able to see frames. trane |
#20
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ASTRO: Widefield North American Nebula/Pelican/IC5068 in [SII],Haand [OIII]
On 01/08/04 11:32 +0900, News wrote:
netscape 7.1??? oughta work...BUT IT DOESN'T Works here with Netscape 7.1, Konqueror 3.1.4 and Galeon 1.3.9. I have no idea why you'd have trouble (but I haven't taken the time to examine the page source, either). trane -- //------------------------------------------------------------ // Trane Francks Tokyo, Japan // Practice random kindness and senseless acts of beauty. |
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