TAG FOV and other Calculation
Re: replacing the ST-8
Art Morton wrote: > I went to Jim’s shop for filters. He did not have any so I did not buy. I think that you want Astronomik, but Astrodon get a lot […]
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Re: RA driftage
Art Morton wrote: > I do love the amazing lack of blooms. I hear the Orion color camera > calling me. > > I just have to find out some way to […]
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Re: PEC
Art Morton wrote: > At some point you do want to get the PEC programmed and running. Do you use PEC? > I presume this will be the next step after 5min […]
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Re: Fwd: [vc200l] Best FWHM with VC200L
Art Morton wrote: > J, > > You have this issue. Maybe this is the nature of the beast. I have > sent you my FWHM and they seem to approach the […]
Trixie balance calculations
Asi I was designing Trixie, I aimed to have the balance point be at or behind “ring 2”, which is the middle one. I put all the actual weights of things into […]
ATM dreams
I also collected all of the ATM photos into one place. I need to crop and resize, but I’ll have a decent record of the process. I’ve really enjoyed it. It makes […]
HOWTO – calibrate a laser collimator
I bought an Orion laser collimator, but suspected that it was out of collimation, so I tried to adjust it, and got it *really* out of collimation, so I needed to realign […]
Pumpkin field flattener / reducer?
I’m trying to decide if the curved field on the AT66ED is going to bug me or not. I think that it is. But the field flattener unit is also a focal […]
Photographic Polar Alignment
PHOTOGRAPHIC POLAR ALIGNMENT by Greg Beach The one, often elusive requirement for any astrophotographer and telescope owner is proper polar alignment. This allows long-exposure photographs to be taken in order to build-up […]
Pumpkin's huge FOV
It was clear last night, but the forest fires put up so much smoke that I couldn’t see anything in the way of stars. I just calculated Pumpkin’s FOV and compared that […]
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.