Date: Sat, 08 Feb 2003 08:25:14 +0100 From: Maciej Reszelski <macres@pro.onet.pl> Taichi Kato wrote: > > (fwd) Re: [AAVSO-DIS] CCD-V Vs visual observations = U ORIONIS > > > I have just visited the page and I have some questions. I have a Nikon > Coolpix 4500 and I would like to know if I can use it to estimate some VS > magnitudes. Using it with the telescope I can see fainter objects than using > only my eyes. But I am not sure if this kind of camera is reliable to > VSOing; I am not sure about how to report the magnitudes (C: unspecified > unfiltered CCD?) and if I can use GSC and Tycho-2 magnitudes as references. > Thank you. > > Regards, > Raquel Shida Dear Raquel, Well, It depends also what is the main detector of your Nikon. Is it a digital camera with CCD chip (as some Internet cameras?) I don't know about Nikon too much. The good idea is make some tests and compare them with knowing estimates. I recommended Tycho-2. GSC is not photometric catalog. Some my friends make a good photometry using cameras such as Vesta SC765 etc etc but you must make some much more work (corrections etc) best regards, Maciej
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