TAG C9.25
Aristarchus, Feb 26, 2010
I tried out some high-resolution lunar photography. With the C9.25 and the NexImage (including the ever-present 2x Barlow), I have a FOV of about 2′, so it’s strictly for “craters”, rather than […]
Mars, Feb. 26, 2010
I finally have a photo of Mars. I started doing astronomy right after The Big Mars Opposition of 2003. By the time I had my astrophoto mojo working, Mars was a dim […]
General / Maintenance / Optics / Techniques
Rainy weekend, perfect for maintenance
I had a bunch of maintenance piling up in the obvservatory, so I decided to do some of it since it’s raining all weekend. I spent a little time getting the mount […]
Rig maintenance – moving cameras around
I had moved the ST-4 to the main scope to do some periodic error testing on the mount at higher magnification. This helped me to see the errors more clearly, but also […]
C9.25 Robofocus installation
I finally got around to taking a photo of the RoboFocus installation on the new C9.25. Because the back of the scope isn’t flat, the installation was a bit of a challenge; […]
IDAS LPS is a good thing
I’m testing out the new C9.25 tonight. Last night, I’m writing off as a “configuration” night. The sky is a little cloudy tonight, high thin clouds that serve to brighten up an […]
A Very Tough Night
This was one of Those Nights. Everything went wrong. It started with killing power supplies. I am trying to get a reading of the amperage coming out of the mount, which will […]
Re: Yes you are crazy
Art Morton wrote: > I do not have data to forward, but what I remember is +- 0.00 to > 0.04~0.15 on each axis. I’m averaging more in the 0.2-0.8 range (I’m […]
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Re: Yes you are crazy
Art Morton wrote: > I will be getting out again. 2 weeks until the next astrophotography moon… > I presume that you have a Focal Reducer for 9.25 and it would be […]
C9.25 radius blocks
I knew I should have bought DC925 rails when I was working on Trixie last summer… I went out and stimulated the Astromart economy and now I have a C9.25 but no […]
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.