Quote:
Originally Posted by orion69
Well, I completely agree with you on that one... 
Any type of G2V calibration or anything involving Sun and telescope without filter is not so "bright" idea.
Why not just use G2V stars? |
Haha, thanks
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
No big deal. I'm sure I can find a G2V star.
Quote:
Originally Posted by multiweb
Only if you're quick.  |
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. |
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
|
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