Bolton Astronomical Society

understanding the polar scope
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Author:  bchamberlain [ Fri Feb 08, 2013 3:56 pm ]
Post subject:  understanding the polar scope

Hi. Before going to Ennerdale tomorrow for the dark sky weekend I've printed the polar finder chart out for the two nights. I've just realized that ticking or unticking the 'View through telescope' box I get an opposite. reading. I know the reason for this but I don't know what the polar scope is giving me. I may have been doing this wrong for some time. Any help please.
Bill C

Author:  rwilkinson [ Fri Feb 08, 2013 9:48 pm ]
Post subject:  Re: understanding the polar scope

I think that most polar-scopes are simple refractors (my two certainly are), therefore they will produce an inverted image - so you'll need to tick the "view through telescope" box.

But just to be sure, first get Polaris near to the central cross-hairs of your polar-scope and then note which way its image moves as you adjust your mount in azimuth and altitude - if it goes the "wrong way", then you're looking at an inverted image.

Author:  bchamberlain [ Fri Feb 08, 2013 10:33 pm ]
Post subject:  Re: understanding the polar scope

Thanks Ross. I'll check it out if I get a clear sky at Ennerdale tomorrow. The forecast isn't looking too good though. thanks again Bill

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