Polishing a Worm!
Posted 21 December 2012 - 10:53 AM
Based on my measurements, my Aeroquest worm is really +/- 8.
this is based on isolating the fundamental on the CGEM. the 8/3 is actually much worse (about 20" p-p). Total system PE is about 40" p-p.
to be honest i don't think the Aeroquest would be +/- 2.5" - that would make them better than the Ovision and even better than the native PE of the Mach1 or AP900... which seems to stretch credulity a bit much. I'm not trashing the Aeroquest - it's $100 after all. Just being realistic.
Posted 21 December 2012 - 11:27 AM
Posted 21 December 2012 - 01:35 PM
Posted 21 December 2012 - 04:27 PM
What kind of PE should be expected from a brand new G11 with Gemini 2 out of the box. From what I have read in several places about 5 arcseconds peak to peak. Can anyone verify this.
I know how to lap valves on a car when doing a valve job, but how do you lap a worm.
i was a little disappointed by mine... about +/- 16 arcseconds. the absolute value is not as important as the steepest rate of change in arcseconds/second though. that's what tests your guiding setup. unfortunately i've got 2 or 3 places on the worm where the rate of change is pretty high. even with an OAG i'm probably throwing away 35% of my subs due to oval stars.
Posted 22 December 2012 - 11:14 AM
Posted 23 December 2012 - 05:49 PM
Now, I can't tell if the OPW-G11 really improve RMS on PHD as the 50mm mini guidescope was intruduced at same time. Ill have to go back using my OAG TS-9 and check.