TAG FOV and other Calculation
Deep Sky / Long Exposure Photography / Observing Reports
The Astrophotography Moon is back — Veronica gets a chance at Ha
Now that the Gemini mount is back in service, I decided to try out higher-magnification photography with the new Ha filter. I had a little maintenance to do first; focusing both cameras […]
Re: shortest possible drawtube?
Hi Ron, When you get back from WSP, and during your next CNC run, whenever that is, I’d like a 3/4” travel drawtube with compression ring fitting. I’d also like to order […]
Astro knowledge / Observing Reports
Re: C9.25 first light
A, Once and for all, we are talking about two *different* parts of the sky. You are referring to: The Trapezium, Theta Orionis RA: 5h 35m 17s Dec: -5 23′ 27” http://www.astropix.com/HTML/B_WINTER/TRAPEZ.HTM […]
Re: Last night Raw
Art Morton wrote: >> It’s continually amazing to me how close our FOVs are. That’s totally random, given that we’re using different size chips and different focal length scopes. Or maybe it’s […]
Starfield memorization: M51
In an image of M51 taken near Feb 5, 2009 (todo: find this image), there is a really pretty blue star that’s very nearby the galaxy. I’d like to use that star […]
Uncategorized
nyah — you and your fancy "software"
Awesome meridian flipping is usually the result of extra software (like CCDCommander) which does a plate solve to put the mount in the correct spot.
Focuser / Maintenance / Optics
Re: scope getting dialed in
Art Morton wrote: > With a couple more moon nights you will have a perfectly calibrated G-11 I hope so; It really is a lot of new stuff to learn. Someday I’m […]
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 […]
shortest possible drawtube?
A, In order that I can use my scope for either visual or photo, I have this long-ass drawtube. It’s racked in for the camera, racked out for the eyepieces, everything works, […]
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 […]
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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.