[Aavso-photometry] New Member - Scope Questions

[Michael Crook]

Thanks to everyone for the info - I'll give the
refractor a go and see how it goes.

Cheers,
Mick 


--- BailyHill at aol.com wrote:

> Hello Mick
> 
> Thanks for the info on pixel size.  I cannot comment
> about the refractor, 
> others have a better line on this than I.  Sounds
> like good work can be done.
> 
> However, for best photometry, you should have 2-3
> pixels for your FWHM.  With 
> this scope/camera, it looks like you are at about
> 2.1 arc seconds per pixel.  
> Depending on your seeing, you could be
> undersampling.  If you have the scope 
> already, use it and see what your accuracy
> limitations are by observing some 
> standard stars.  The limitations may be well within
> the accuracy required for 
> the projects that you intend to tackle.  
> 
> If you are considering buying a scope to do this
> work, I suggest getting a 
> longer focal length.  This of course, may put
> additional requirements on the 
> mount, to get proper tracking and pointing.
> 
> Clear Skies
> Gary Walker
> 



		
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