On Saturday 18 July 2020 16:47:28 Karl Jacobs wrote: > Hi Gene, > > 0.01 arcsec is way too high resolution. Unless you have a telescope > with 12.6m diameter (sin(delta) = 1.22 * lambda/D, with delta the > angle in radians, lambda the light wavelength (take green 500nm) and D > the diameter.) Even then, in extremely good skies from ground level, > our atmosphere might only allow an arcsec of seeing (scintillation or > twinkling of the stars). This is why you guys over the pond launched > Hubbly into orbit. And ground based astronomers use adaptive optics > these days.
Chuckle, not much chance of doing that to a Meade DS-10. Poor mirrors to start with. I don't believe the primary is even a parabolic. The secondary was corroded when I got it, and from my end looked too big, blocking a lot of the primary and only usefull with very low power eyepieces. So I replaced it with one of about half the OEM versions area to let a little more light find the bucket. Then had to pad the mount to restore focus since it was thinner, and bend the bracket a bit to align it axially to attempt centralizeing the coma. Newtonians have a very narrow FOV, but you knew that. With better seeing, I likely would have sawpped it for a 16" Schmidt-Cass. Bring big wagon loads of sheckels for that though. But it seems clear skies are a bit rare when one is only 1100 feet ASL and only 200 miles from the right coast. Light polution is a major problem. But it does help to keep me out of the bars on clear nights. > And yes, I am an astrophysicist using LinuxCNC for fun. > Cheers and clear skies, > Karl > Thanks Karl, stay safe and well. Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis Genes Web page <http://geneslinuxbox.net:6309/gene> _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
