Hello all, This is my serious experience with narrowband imaging and I have choosen the Crescent nebulae to begin. 24 hours on this nebulae and the sharpless...
Hi Nicolas, great image and very deep, the OIII shockwave envelope came out very well! it is definetely a delicious croissant :-) btw, the french nick...
A beautiful image Nicolas! Clear skies, Kevin Dixon www.kevindixon.westhost.com From: nicolas outters Hello all, This is my serious experience with narrowband...
it was clear and a bit too windy for serious long focal length work up on Fremont Peak last night. But the skies were clear, good transparency, warmish (low...
Hey there Richard, Nice shot. I was hoping to be down there last night, but got work blitz'd late in the afternoon. Oh well, there is still the rest of the...
Very nice composition on both images. You show them with very high contrast. I know that it is a matter of personal preference, but it does bring up the noise...
I agree, that is a "zowie" type image well done Nicholas! rdc ... From: erdmanpe To: narrowbandimaging@yahoogroups.com Sent: Sunday, July 02, 2006 8:50 AM ...
Steve "NICE" job You know it blows me away how these image sessions have turned into full weeks of works 24 hours, 8 hours, 6 hours. Etc. Happy 4th to everyone...
A real beauty Steve. I love the detail that you have captured. Clear skies, Kevin Dixon www.kevindixon.westhost.com From: sc02492 Hi everyone, After a major...
Thanks Peter. I have been experimenting with a higher contrast approach to processing and am trying to decide which I prefer - a lower contrast approach or...
Thanks to everybody for your coments. Nicolas Outters. site astrophotographie observatoire d'Orange : http://www.astrosurf.com/nico.outters/astro site golf pro...
Thanks, Neil, Michael, and Kevin. I always find M27 interesting. In addition to the Ha skirt, there is a definite OIII skirt as well, but without as much...
More exposure time is always good, and you might also consider going to longer subframe exposures as well. I now use 1 hour normally, 1/2 hour on brighter...
Hello Nicolas, I'm a little late here, but I wanted to say that this is a very nice image indeed! Wow! 24 hours! I have not begun to think in those terms yet. ...
Another nice widefield, Richard! Keep it up! Eric ... work up on Fremont Peak last night. But the skies were clear, good transparency, warmish (low 60s) and a...
the first time I shot it I used 2x2 binning to get a speedup of exposure time as it was it was still quite faint. that was in 2003 here's that image: ...
Here's what I still consider a work in progress (and I ask myself which of my images is really finished ;) ) of the North America Nebula and Pelican Nebula...
Thanks for the comparison, Richard! Yep, even in your version the SII data shows up weakly compared to the H-alpha and OIII. I did not realize how faint this...
there is really no reason to use luminance. stick with straight up RGB = [SII]/Ha/[OIII] the luminance only complicates matters and offers no benefit. You need...
Hi Richard, ... RGB = [SII]/Ha/[OIII] ... need to think about what the luminance does and why it does it the way it does and you will see that it is...
luminance is nonsensical for narrowband images think about what it does: mathematically it is like "Anding" one channel with another. Where either channel has...
Thanks, Richard. Now that you mention it, IIRC the truest representation of an object and its details is just RGB, is it not? LRGB being the shortcut to allow...
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