Good Morning Bob, Thanks very much. Yes, the camera has very good sensitivity to H-alpha. And, it does so without blooming, which to me is a real advantage....
Thanks Bob. I am about one quarter of the way through the image acquisition phase. Hopefully, I'll get some clear nights soon. Clear skies, Kevin From: Bob...
Kevin, Thank you for posting the subframes. It was very interesting and informative for me to see how well your camera does in those timeframes. I use an...
Hello, I wanted to chime in and say that I do most of my NB imaging during the bright moon phases. This latest image I did with the moon only about 45 degrees...
Absolutely gorgeous, Ken! The master strikes again! Interesting you don't have problems with moonlight, especially with the OIII data. How do you do a...
Neil, I suspect Ken's success is based on several factors, not the least of which is the very narrow nature of his filters. My Astronomiks are great filters,...
True, true... The narrower filters help (I use them too). I find that the light/air pollution scatters the moonlight, and that scattering definitely spans...
Neil wrote: "True, true... The narrower filters help (I use them too). I find that the light/air pollution scatters the moonlight, and that scattering ...
Hi Lynn, I just posted a spreadsheet of the the Sharpless catalog in the files section. You can sort that any way you like. I used it to generate a catalog for...
That's a great list, Dave...thank you. Just what I was looking for. Great. The VanDan Burgh catalog sounds interesting. Is that easy for you to put in the...
... I have a PDF copy of the Sharpless paper in the 1959 ApJ. The Sh-2 objects are listed in numerical order, which is also galactic longitude order, and hence...
... Hey there, Lynn. I also just uploaded an Excel list to the files section of the group. It has automated sorting implemented via buttons/macros, so enable...
Done. By the way, I created these files when I was generating catalog files for RTGUI. Those have been posted in the files section of that yahoo group. RTGUI...
Hi Neil Great list, Neil...thank you. Also thanks to Dave and Drew for the lists they provided. Being able to review these in RA allows mwe to plan the days...
Hi Neil Great list, Neil...thank you. Also thanks to Dave and Drew for the lists they provided. Being able to review these in RA allows mwe to plan the days...
Hi everyone (first post!) I currently own the Astronomik narrowband filters, which are all 12nm. After reading the posts here I was thinking of going for...
There will be no significant effect for 5 nm and even 3 nm filters at f/5. Please see slides 25-28 for supporting data from my talk at the Advanced Imaging...
Hello Everyone, I am currently shooting Ha data of a galaxy and my Ha flat is essentially useless. If I calibrate using the flat, I get a dark area in the...
Hi Neil, It's a sky flat. I'm shooting the M106 galaxy with the 12.5" RCOS and there is a lot of dark sky around the galaxy, in the center of the frame. The...
Bob, I'd encourage you to make a flats box. I struggled with twilight flats, the light changed quickly enough so I kept having to change exposure lengths, none...
Thanks for the note David. With CCDAutoPilot3, it is very easy to get consistently exposed twilight flats. Just set it and forget it. The program points the...
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