Does anyone know why? All they show now are the Custom Scientific and Baader Planetarium filters. Cust Sci for Eline and LRGB and Baader for Eline I wonder if...
http://www.narrowbandimaging.com/ic1396_p400_pl9k_baader_FLI_s2hao3_page.htm this is a total of 6 hours 20 minutes using the Pentax 400mm wide open at f/4 with...
That's an impressive image Richard. The 9000 did an amazing job with the tak400 lens.  It's nice that you always come through with interesting imaging...
another from this past weekend made with the camera lens system and the new Proline 9000 this is really low: -35 declination from 37.8N there's 90 minutes of...
Hi Richard Very nice end result on this object, can't wait to see what you produce when you get the mechanical issues sorted out Best wishes Gordon ... and the...
Hi Richard Again a stunning end result, it is great to see the difference between this and the incomplete version that you showed me earlier this week Best...
It really should not matter Bob if you have a flattener close to the filter (just in front of it) maybe you will want to put the AR coated side facing the...
but they show them on their website SBIG has them removed from their website when I looked the day I posted the question: July 2 I didn't see any Astrodon...
this is starting to shape up. Stefan from the USENET is right: it is faint. I have 7 hours of Halpha binned 2x2 in a big pixel camera (12 micron pixels) with...
Great image Richard, specially considering it was taken at f12.6 with a narrowband filter. And the guinding is perfect, 5760mm, wow! Regards, Florencio ... ...
well thank you Florencio. I appreciate your comment. Regarding the guiding: I don't do anything special. I am not using the PEM for example, No PEMPRO (I have...
You are using _way_ more aperture than I can benefit from. I live in Saratoga, CA, a little bit into the mountains up Hwy 17 out of San Jose towards Santa...
Drew with the hot weather we are having the seeing is quite good. the transparency hasn't been so great though with the fires and summer smog hey we can fix...
Holy Moly, Richard! The thought of guiding at 5760mm gives me nightmares. :>) It will be quite an achievement to get an image of this faint target. Bill ... ...
Richard, a wonderful image !!! AT immense FOCAL LENGTH YOU ARE right <g> the Proline 9000 is an amazing chip and the scope maker SCORED with this OTA ...
Usually the hot weather we have been having in northern Calif brings steady seeing if you can get transparency This year is no different but the fires have...
Hi Richard, i like this much more than the previous IC1396 you shared (because of the foV). is that great white area a saturated star? Clear skies, Florencio ...
... shared (because of the foV). is that great white area a saturated star? if you are talking about the bright star in the upper part of the nebula, yes that...
I like Richard's smoother rendition of this one, but here's my attempt at Sh2-101 in Ha only http://autostarsuite.net/photos/skywardview/picture17027.aspx ...
hey that came out nice! here is an older version of SH2-101 in [sii]/ha/[oiii] http://www.narrowbandimaging.com/sharpless_2_101_page.htm with some luck I will...
Hi Richard and Florencio, Those are great images. While the SII and OIII mapping gives it depth, the Ha-only image has so much detail, and is my favorite....
... depth, ... some ... I am not sure of the camera you are using and its noise profile but let me say that it may not be the best strategy to take half hour ...
Hi Richard, Hmm, interesting points. My cooling is neither aggressive (10C imaging temp) nor controlled (actually 10.0C to 12.0C). This is the result of my ...
... From: Kel To: narrowbandimaging@yahoogroups.com Sent: Friday, July 18, 2008 12:03 AM Subject: Re: [NBI] Another Sh2-101 Hi Richard, Hmm, interesting...
Quick question to the group : If I do combine two identical h-alpha filters, I would expect that the combined transmission would be t_combined(wavelength) =...
Benoit, You would indeed be correct about stacking identical filters. Basically you produce the square of the gaussian function...assuming that your filters...
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