Yesterday evening's beautiful conjunction of Mars and the Pleiades. 6D/92 combo http://www.abmedia.com/astro/current/Mars-M45-AP92.html Chris

It looks like the flattener I received with my AP 155 EDF is not the original. Here are pictures of the original. Look at that price!! -- Jim Phillips

My “New” AP 155 EDF with 4” focuser arrived today. Dovetail plate. Rings, etc will arrive tomorrow. Planning on using it on my AP Mach1 for visual observing only. Pebble finish with what looks like 15

Yes, that's it down at about 8oclock position. Remove the cell, turn it upside down, then push it back under the lip with a Q-Tip. If you see any others, do the same for them also. Roland

Does anyone know what might be causing the strange diffraction spikes I'm getting from my 152mm f/7.5 Starfire EDF with 4 inch field flattener. When I look through the lens down the tube I cannot see

Thats slick, i have never been positive about the number of mine so Ill have to get out my red light and see tomorrow!

I received my AP130GTX over the winter, and have finally had the skies to test it out recently. I'm finding that the star shapes are a bit odd. My first thought was pinching, but thought I'd bring it

At long last, Sky & Telescope has granted permission for this article to be posted to the Astro-Physics user group. Permission is limited to this user group only. This copy of the article should not b

Astro-Physics Mach2GTO Equatorial Mount on a 12inch ATS Portable Telescope Pier https://www.youtube.com/watch?v=-zUAeOE0c3w Carry Handle for Large Refractor Telescopes https://www.youtube.com/watch?v=

130 GTX was delivered this week. I have not tried imaging in any serious way using scopes till now however I have been using star trackers + DSLR for some wide field imaging. Before GTX was delivered

Hello, My question is regarding a FF/FR for AP155EDF. It has the 4" FT focuser version. Is there a focal reducer that would match up to this? I am considering an APS-C size sensor at the moment but wo

I have a Stowaway which I have paired with 92TCC reducer and an ZWO ASI294 mono camera. Using the bin 1 mode the camera has a pixel pitch of 2.4 micron for just under 1 arcsec / px pixel scale. Even t

I posted this question in another thread about TCC back focus, but thought it might be appropriate here since no one has commented. What is the minimum distance from the back flange of the TCC Quad to

Would I need a field flattener for a Traveller to use a Micro Four Thirds Camera?

John & Jay: So the two of you have stayed true to "hollow" state devices. To the list of other neat stuff I will insert "National" and "Hammarlund". I will add that real radios "glow in the dark". Be

I have posted a fair amount of stuff to that thread regarding encoder operation on Astro-Physics mounts, including the AP1100/AP1600 and the Mach2. I hope that it’s been accurate – and I am always hap

This post has a bit of misinformation about encoders on our 1100/1600 mounts, and I need to clarify how the encoders actually work: Sounds way too complicated to me. When I even suspect that one of my

The weather finally got decent here in northern california so I dusted off the trusty ST-8300 this week for some Ha and narrowband work on the fleeting nebula season.... Tonight I set up the 92 Stowaw

I recall a discussion on this a while back, but I can not find it. A-P sells sets of 1 mm spacer rings for tweaking the backfocus spacing of the Quad TCC. Is there a particular methodology for determi

I’ve got one of those original AP 10” F/14.6 Maksutovs. Great for lunar and planetary imaging also. AP 10” Damian Peach, Dave Tyler, Jim Phillips Get Outlook for iOS