Ron, I don't think this is what Luis is asking. Luis would need to respond, but, It looks like he is asking is if a master dark consisting of summing 30 ...
I think the main thing contributing to the different pricing is that each of the various companies guessed wrong on where SBIG would come in price-wise. Orion...
I'm confused by what you are asking; it looks like you are asking about something that absolutely won't work: summing 30-second darks to get longer darks. No,...
Ron, If I obtain 30 dark frames, 30 seconds each one, is it correct to construct various libraries applying the sum of the frames such as: 15 dark frames of...
Ryan, all dielectric-coated filters are "mirrors" outside their bandpass, including red, green and blue and narrowbands. The key is how the manufacturer...
Matts, There are lots of things to look at besides the base price of the camera. The Orion cameras have in the past, always had a lot of pattern noise, this is...
Sheldon, I don't see any reason a manual filter wheel would not work. You may be able to get one of these plus filters on Astromart. Don't forget to check on...
We guarantee >90% transmission at the emission line for our 5 and 3 nm Astrodon narrowband filters. Transmission dominates your Signal (S) in S/N. S/N is...
Don, Thanks, i have 3 ads out there now. just curious though, since i will not be spending the $400 or so necessary to buy the cfw5 at the 2 suppliers that...
Hello Bob, Thanks for the kind words. The main thing for me is that it is an AstroDon filter. I have another brand, wider than 6 nm FWHM, that has terrible...
Thank you Dennis for the in depth Ha information. I just recently purchased one myself & your info here & that inspiring pacman shot really has me excited to...
Dear group In recent days two new cameras has been introduced; the Orion Persec 8300 and the SBIG ST-8300. From before we have the QSI 583. They all have the...
Dennis, Excellent summary. What do you see as the pros and cons of a 6 nm Ha filter vs wider passband such as 13 nm, for a fast astrography like yours? Bob...
Hi Mick, Have you considered the new SBIG ST8300 at $1999? I have an SXV-H9 which I like alot and would recommend (maybe used?), but dont forget with the SX...
Hi. I would like to upgrade to a new camera,and i am looking to-wards a monochrome one.But as usual i am on a budget,so on looking around a couple of cameras...
Hi, You might try putting a "want ad" for a cfw-5c on Astromart. You might just get lucky! Good luck, Don Waid http://www.waid-observatory.com ... From:...
I know this question might be better at the SBIG group, but as an abject beginner I thought I would post it here first. I have, spending very little, acquired...
... A big factor for me in choosing 1.25-inch filters was the availability of a mechanism that would accommodate the standard LRGB filters plus Ha, S-II, and...
... The filter size 'needed', is the diagonal dimension of the chip, plus the distance from the filter to the CCD times the focal ratio. So if you have a f/10...
A google search shows several GSO focusers being used with RoboFocus. Try emailing some of those folks to see how they hooked it up. On of the standard...
Dennis Persyk, Thanks for the tutorial. I am sitting on 6 hours of Ha SH2-171 waiting for clear nights to get RGB. I have Actions, but wasn't aware of the...
Just breaking in to imaging and building an equipment base. Question: Is there a fundamental reason for selecting 1.25 inch or 2 inch filters apart from the...
What a wonderful discussion, Dennis. Thanks for posting this. I recently ordered one of the new SBIG ST-8300's and agonized over whether to opt for C or M. I...
Our skies are filled with nebulae. The nebulae of interest in this tutorial are huge regions of gas – gas clouds. The nebulae I'll discuss here are called...
Hi all. I was wondering if anyone had seen or heard any usefull info regarding this technology... http://www.andor.com/learning/applications/Astronomy/ -- ...
Thanks for that Ron, I'll go and check the files section, otherwise I could just revert to the 1.4.9 (I think ??) that had stood me in good stead for the past...
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