Quote:
Originally Posted by orion69
Well, I completely agree with you on that one... ![Wink](/vbiis/images/smilies/winking70.gif)
Any type of G2V calibration or anything involving Sun and telescope without filter is not so "bright" idea.
Why not just use G2V stars?
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Haha, thanks
![Smilie](/vbiis/images/smilies/happy19.gif)
I'm glad you agree, however I wasn't considering pointing the scope at the sun, completely open and unfiltered, I think that would be worthy of an idiot award! Just thinking of different ways of doing things, using a nearby source. Maybe there is a reason why there wasn't much info on this method
![Poke Toungue Out](/vbiis/images/smilies/tongue05.gif)
No big deal. I'm sure I can find a G2V star.
Quote:
Originally Posted by multiweb
Only if you're quick. ![thumbsup](/vbiis/images/smilies/thumbsup.gif)
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Lol
Quote:
Originally Posted by RickS
Erik,
I used G2V calibration quite seriously for a while (doing all the extinction calculations with a spreadsheet, etc.) and found it sometimes produced decent results. These days I often use eXcalibrator which is much quicker and easier so long as you can plate solve. It's worth checking out: http://bf-astro.com/excalibrator/excalibrator.htm
I generally use a variety of methods to determine ratios for my colour combine and then pick the version I like the most. Most people appear to want pleasing rather than accurate colour
Cheers,
Rick.
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Thanks Rick. For me, at this stage I am generally looking for a pleasing colour, however I would like it to be an accurate representation . My concern was if I used equal exposure lengths, I would end up with a completely messed up image! However I don't know how severe it might be. If it's only subtle, I'm sure that can be processed out? It's been horrible weather here for a long time now and I haven't had a chance to test anything. When you say it "sometimes" produced decent results, what do you think caused them to be "not decent"? I have never plate solved before, but I'll read into it and check out your link.
Quote:
Originally Posted by LightningNZ
Rick makes a really good point - if you really needed to be accurate then you'd need to form an actual series of spectroscopic data points. Namely you'd want to have a calibrated blue and red point as well, at the very least.
Cheers,
Cam
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Thanks Cam. It's not that critical to me (at this stage) to be extremely accurate. I'm just after a generally accurate colour.
Thank you everyone for your input. I think what I'll do is just find a G2V star and give it a shot?
Erik