main@ap-ug.groups.io

AP Product Catalog Database 14

Hello Astro-Nuts, In recent weeks a few forum members have mentioned it would be nice to have a repository of old AP catalogs and offered to create a website database. This is a project we’ve had on o

Hello Astro-Nuts, In recent weeks a few forum members have mentioned it would be nice to have a repository of old AP catalogs and offered to create a website database. This is a project we’ve had on our radar but have not had time to dig into, so we appreciate this has been taken on by some of our Astro-Nuts. The website is here if you’d like to take a look: AP Product Catalog Database While you’re there, check out Tony Simon’s (aka Harley Davidson and Star Astronomer on YouTube) video of his catalog collection. If you have old catalogs and would like to add them, you can upload them to the Files section of the ap-ug group or the ap-gto group on Groups.io. They will be added to the database from there. I’ll pin this topic on the Groups Messages page so it’s easy to find. Many thanks to Holger Merlitz for creating the website and volunteering to steer this project, and all of you who have submitted your catalogs to the database. And a challenge: Can anyone find a catalog with the Hampden Ct address? Karen AP

By Karen Christen ·

New Image: Sh2-155 aka The Cave aka Caldwell 9 with my AP155 6

Hi everyone! Here is a standard H-Alpha / RGB take on The Cave: http://www.astrofoto.ca/stuartheggie/ccd_photos/Sh2_155_AP155_G4_HaRGB_June2021.html 22x20min H-Alpha 15x10min each of RGB AP155, Moravi

By Stuart ·

Interesting Back Spacing for 130GTX. Is this far off spec considered normal, and does it even matter? 13

Sorry for the repost and deletion of my previous topic. I cleaned it up a bit after learning a little bit about what to expect. The following is my experience dialing in the Field Flattener. I've had

By Chris White ·

AP app for ra finder 12

I just purchased a new iPhone and was shocked when I tried to download the Astro-physics app which shows you the exact location of Polaris so you can align your mount. It says the app is no longer ava

By thefamily90 Phillips ·

Moon slivers 7

Hi again, I hope you’ll indulge me another bit of A-P appreciation. Sometime in the 1990s I purchased my first Astro-Physics telescope - a 105 Traveler - along with a 400 QMD mount. I had my eye on a

By Alan Friedman ·

Glass Path Compensator question 14

I just received my Mark V binoviewer set from AP. Beautiful equipment. I've got a newbie question. The Baader instructions state that each of the GPCs (it came with the 1.25x installed, and I purchase

By Eric Weiner ·

Chasing Sun Slivers 9

Hello all, I’ve been working the later shift at work for many years. But looking for a peaceful spot with a good east northeast horizon for last week’s eclipse got me in to the office at 4:00am . Our

By Alan Friedman ·

A quick Draco Triplet 27

As a travel imager the late sunsets of summer can make it a real struggle to shoot on a work night, but who needs sleep anyway? I managed to snag just shy of two hours on the Draco Triplet last night

By skester@... ·

Jupiter 06/13 GRS 4

Monsoon season has begun here. It had been rainy for the past weeks. I was happy that there was a clearing today. Seeing was variable due to the SW monsoon. The GRS is well resolved in these images. N

By Christopher Go ·

Lunar eclipse composite 5

Link to image ( https://imgur.com/ATkorMD ) First ever attempt at shooting an eclipse that too with my recently delivered AP 130 GTX

By Rahul ·

Suggestions for Stowaway Tripod and Head 9

I'm looking for suggestions for a new tripod and head for my still-almost-new Stowaway. I have two tripods that I want to replace with one. The first, for terrestrial work, is a lightweight aluminum19

By jrpmsn ·

Photo m13 2021 updated 2 #photo-notice

The following photos have been updated in the JMD Pre ED AP Starfire album of the main@ap-ug.groups.io group. m13 2021 By: deitzelj <deitzelj@...>

By main@ap-ug.groups.io Notification ·

Rule of Thumb for refocusing an AP160 as a function of temperature change? 5

Hi, Anyone have a reasonable rule of thumb for an AP160, of the form, "If the ambient temperature changes by x degrees, you should refocus", and a suggested value of 'x'? I'm using it at f/7.9 (measur

By wbelhaven ·

questions on newly acquired AP130 EDT f/8 5

Hi, I just picked up an AP130EDT f/8 OTA. It has the usual "paint rot" on the dew shield. I have a few questions ... 1. Where can I find the serial number? I looked into the objective and see SF58242

By albireo1313@... ·

New Image: Sh2-115 in HaRGB w AP155 7

http://www.astrofoto.ca/stuartheggie/ccd_photos/Sh2-115_AP155_G4_HaRGB_June2021.html Be sure to click on the image as the resizing algorithm makes it look crunchy in the html file but the 50% image yo

By Stuart ·

Takumar Pentax 6x7 tests RE: [ap-gto] [ap-ug] A colorful Southern Sky Beauty 19

Some years back I did some tests of a handful of Pentax6x7 lenses I had picked up on the cheap Even though they aren’t very well corrected over an electronic imager’s broad spectral responsivity, it s

By Richard Crisp ·

looking for an AP400 Goto mount 20

I hope I am not violating rules but, I just recently picked up a AP 130EDT f/8 and need a decent mount. I am hoping I can find a AP-400 Goto if possible. Anyone know of any available? I know they are

By albireo1313@... ·

Info about 130GTX + 0.72x QuadTCC + ASI6200 51

Hi, I use an ASI6200 camera for my deep sky photography. I have the opportunity to buy a 130GTX with the QuadTCC reducer. I am looking for information and examples of images made with this material. I

By sebkersten ·

[ap-gto] Will the Mach 2 support ..... 3

Result #2: Tracking with 2 refractors piggyback The sky unfortunately was not pristine during my imaging session. High level clouds continued to drift thru the image, so the tracking was at times a bi

By Roland Christen ·

Today's APOD 13

Folks: Congratulations are in order for Ignacio. Today's Astronomy Picture of the Day is one of his images of Omega Centauri. <https://apod.nasa.gov/apod/astropix.html> Congratulation Ignacio. Well do

By Thomas D Jacobs ·