|
lee, further to Slawomir's post, if this is with your 100mm scope, scope diffraction from the relatively small aperture will broaden the stars a little - eg, if you measure 2.8 arc sec, the underlying seeing is about 2.5 FWHM and the scope will have bumped it up to 2.8.
Last edited by Shiraz; 09-08-2015 at 04:52 PM.
|