View Single Post
Old 23-11-2013, 12:20 PM
Shiraz's Avatar
Shiraz (Ray)
Registered User

Shiraz is offline
Join Date: Apr 2010
Location: ardrossan south australia
Posts: 4,822
Hi Bert

at f25 the FWHM of the Airy pattern is 14microns - this sort of focal number is used with 5.6 micron pixels for planetary imaging

at f19 the FWHM is 10.7 microns, used with 3.75 micron pixels

basically, planetary imaging uses ~Nyquist sampling on the optics PSF, not the atmospheric PSF as used for DSO - that is the main difference.

Regards Ray

Last edited by Shiraz; 23-11-2013 at 02:59 PM.
Reply With Quote