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IC405 Hydrogen-alpha Images
IC405 is an emission nebula glowing richly in red H-alpha light. By
employing a selective spike filter that passes only the H-a emission line, one can block out light pollution and even the effects of a nearby full moon. You may view filtered and non-filtered views of IC405 that illustrate the unique properties of the H-a filter at http://home.att.net/~dpersyk/new.htm I hope you will take a look and find the comparison interesting. Clear skies, Dennis Persyk Igloo Observatory Home Page http://dpersyk.home.att.net Hampshire, IL |
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IC405 Hydrogen-alpha Images
"Dennis Persyk" wrote in message om... IC405 is an emission nebula glowing richly in red H-alpha light. By employing a selective spike filter that passes only the H-a emission line, one can block out light pollution and even the effects of a nearby full moon. You may view filtered and non-filtered views of IC405 that illustrate the unique properties of the H-a filter at http://home.att.net/~dpersyk/new.htm I hope you will take a look and find the comparison interesting. Ahah! you have stumbled onto my secrets, Dennis! I love to image faint nebulae during full moons with emission line filters. Here's a 12.66mag planetary shot with Ha, [OIII] and [SII]. This was taken under a FULL MOON. http://www.rdcrisp.darkhorizons.org/pk164_page.htm here are some IC405 shots taken with various emission line filters. Unfortunately they are rather undersampled. http://www.rdcrisp.darkhorizons.org/ic405_Ha_page.htm Keep up that good Ha imaging. I suggest you get an [OIII] filter too. That camera of yours will work even better with [OIII] because the quantum efficiency is better at that wavelength (500.7nm). Best regards Richard |
#3
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IC405 Hydrogen-alpha Images
"Richard Crisp" wrote in message .com...
"Dennis Persyk" wrote in message om... IC405 is an emission nebula glowing richly in red H-alpha light. By employing a selective spike filter that passes only the H-a emission line, one can block out light pollution and even the effects of a nearby full moon. You may view filtered and non-filtered views of IC405 that illustrate the unique properties of the H-a filter at http://home.att.net/~dpersyk/new.htm I hope you will take a look and find the comparison interesting. Ahah! you have stumbled onto my secrets, Dennis! I love to image faint nebulae during full moons with emission line filters. Here's a 12.66mag planetary shot with Ha, [OIII] and [SII]. This was taken under a FULL MOON. http://www.rdcrisp.darkhorizons.org/pk164_page.htm here are some IC405 shots taken with various emission line filters. Unfortunately they are rather undersampled. http://www.rdcrisp.darkhorizons.org/ic405_Ha_page.htm Keep up that good Ha imaging. I suggest you get an [OIII] filter too. That camera of yours will work even better with [OIII] because the quantum efficiency is better at that wavelength (500.7nm). Best regards Richard Richard, your wide field images are out of this world! And yes, the wonders of the narrow band filter seem to be a well-kept secret. The H-alpha filter effectively doubles the number of nights per month I can image DSOs. Unfortunately, doubling a small number produces another small number. I hope you will share your list of targets for H-a and O-III imaging with me. I have not been successful in finding a comprehensive list of these guys – another seemingly well-kept secret. Clear skies, Dennis |
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IC405 Hydrogen-alpha Images
"Dennis Persyk" wrote in message om... "Richard Crisp" wrote in message .com... "Dennis Persyk" wrote in message om... IC405 is an emission nebula glowing richly in red H-alpha light. By employing a selective spike filter that passes only the H-a emission line, one can block out light pollution and even the effects of a nearby full moon. You may view filtered and non-filtered views of IC405 that illustrate the unique properties of the H-a filter at http://home.att.net/~dpersyk/new.htm I hope you will take a look and find the comparison interesting. Ahah! you have stumbled onto my secrets, Dennis! I love to image faint nebulae during full moons with emission line filters. Here's a 12.66mag planetary shot with Ha, [OIII] and [SII]. This was taken under a FULL MOON. http://www.rdcrisp.darkhorizons.org/pk164_page.htm here are some IC405 shots taken with various emission line filters. Unfortunately they are rather undersampled. http://www.rdcrisp.darkhorizons.org/ic405_Ha_page.htm Keep up that good Ha imaging. I suggest you get an [OIII] filter too. That camera of yours will work even better with [OIII] because the quantum efficiency is better at that wavelength (500.7nm). Best regards Richard Richard, your wide field images are out of this world! And yes, the wonders of the narrow band filter seem to be a well-kept secret. The H-alpha filter effectively doubles the number of nights per month I can image DSOs. Unfortunately, doubling a small number produces another small number. I hope you will share your list of targets for H-a and O-III imaging with me. I have not been successful in finding a comprehensive list of these guys – another seemingly well-kept secret. I don't have a comprehensive list, but I do have a log of the ones I've imaged that way in the past few months. Have a look at my reverse chronological list here. Nearly every one I have imaged with the emission line filters is there. http://www.rdcrisp.darkhorizons.org/New_Images_page.htm For me this is like a voyage of discovery: most of the time I've not seen the various nebulae imaged in any way other than LRGB or maybe Ha. Best wishes Richard |
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