Category: General
Re: FocusMax workflow
Art Morton wrote: > > Did you do the FM setup where it builds the V curve for your > optics? This is very important to have a V curve for the […]
Re: drawtube requirements
Art Morton wrote: > On Jan 28, 2009, at 9:38 AM, Jimbo S. Harris wrote: >> Do you know if the focus shifts “in” or “out” during the course of >> the […]
AT66ED field flatness
A, Here’s a shot of Andromeda by a guy who has the AT66 and the 0.8x field flattener: http://www.pbase.com/patjoja/image/90413020/original Note that the corners still have wonky-looking stars. Hm. I’m beginning to wonder […]
Re: Sorry, couldn't help it
Take a look at Fremont clear sky clock! Looks like I have 2 more days of solid skies for shooting. Last night was unbelievable. Steady, dark, nice.
Re: G-11 re-greasing
Art Morton wrote: > The process for me takes two weeks. And that is if I do not get mad > and just cover it on the bench and try to forget […]
Maintenance / Observing Reports / Optics
Re: RA driftage
Art Morton wrote: > All three of these images are fantastic and show that you are tuning > in. In either case here, your optics are quite good. The stars are > […]
Re: Between the Rain and the Fog
Art Morton wrote: > http://www.astromart.com/images/forums/643000-643999/643641.jpg > > The above image was taken with a 12” AP Mak on the AP Super Large > Mount. The angular resolution and image magnification is far […]
field-stripping the G-11
A, I’m thinking about deconstructing the G-11 once the moon goes around again. I have questions: 1) Do you think that it’s possible to degrease/regrease the mount without killing the polar alignment? […]
Re: Mount is level?
Art Morton wrote: > You are convince that the mount is level? The bubbles on the mount say it’s level, although I can certainly check this again. I did have to re-level […]
Re: Fwd: [CCDCommander] Re: PB with meridian flip
I need to set my safety limits. The problem is, I’m not sure where to set them; too conservative and I can’t reach certain parts of the sky. Too liberal and the […]
RECENT UPDATE
Polar Alignment Calculations
Here’s a page that derives Polar Alignment Calculations. (update 5/2020: the original site is gone, so I found the text on Wayback and am inserting it below. This is by the original […]
Gear / Observatory / Telescope
Special Guest Star takes the mount at Hilltop O
The Astro Jedi needed somewhere to store his light sab—- I mean, bucket, and I was only too happy to accommodate him. I have decided that I need to come to a […]
General / Maintenance / Observatory
Dome shutter is motorized again!
I finally decided to bite the bullet and fix the shutter motor. Things went sideways last winter, and I’ve been opening the shutter manually (and tying it shut with rope, so we […]
Trixie 2017 – tube mods
I finally got around to cutting the MTA-UTA tubes to length; the only eyepiece that would come to focus with the focuser spacer in place is the Televue 55mm Plossl. If I […]
MOST COMMENTED
Observatory
Observatory 2.0 – Time has come today!
General / Maintenance
First Light, a deeper look
Mount / Observatory / Telescope
Observatory 2.0 – Result!
Observatory
Observatory 2.0 – The Pier goes in
Gear / General / Maintenance
Martin Farmer Wormblock installation notes
Deep Sky / Long Exposure Photography
NGC2244, The Rosette Nebula
Deep Sky / Long Exposure Photography
Another beautiful night.