Reflector Telescopes

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Large newtonians

Last post by Lady Fraktor « Sat Oct 07, 2023 3:25 am
Replies: 19
by Lady Fraktor » Mon Oct 02, 2023 6:50 pm

First post

In Germany it is quite common in some areas to go to star parties and find many very large newtonian.
I came across an article of Dr. Erhard Hänssgen...

Last post

You missed none of the above as a response Joe ;)

19 Replies

602 Views

Last post by Lady Fraktor
Sat Oct 07, 2023 3:25 am
Telescope tube flexure

Last post by SkyHiker « Sat Sep 30, 2023 5:16 am
Replies: 7
by SkyHiker » Sun Sep 24, 2023 4:42 pm

First post

I have been aware for quite a while that my 12 F/4 GSO Newt has flexure issues. This is easy to see by inserting the Howie Glatter into the focuser...

Last post

That's quite a comprehensive and technical analysis of your flexture problem and my brain is also having a hard time of it.

Let me add some...

7 Replies

261 Views

Last post by SkyHiker
Sat Sep 30, 2023 5:16 am
Off Axis Solar Dob with Dust/Cover plate - What is the new F ratio?

Last post by TheButcher « Tue Sep 26, 2023 10:57 pm
Replies: 4
by TheButcher » Tue Sep 26, 2023 2:19 pm

First post

Hey All,

I have a question about using my AD12 Dob with Baader Solar Film in the Off-Axis circle that came with the Top Lid/Dust cover. Now I am...

Last post

Thanks Again JT,

I think I may start my 3D print for it. At least experiment :)

4 Replies

169 Views

Last post by TheButcher
Tue Sep 26, 2023 10:57 pm
A Question For Dobsonian Owners

Last post by Mike Q « Tue Aug 22, 2023 9:58 pm
Replies: 7
by Refractordude » Sat May 23, 2020 5:57 pm

First post

It will be a little while before I have the play money for a 6 ed apo refractor with an az mount. I hate diffraction spikes, but often think of...

Last post

I have 2 Orion dobs, a 10 inch and a 16 inch. They give me absolutely beautiful views of anything i look at. I will go as far as to say that the...

7 Replies

2332 Views

Last post by Mike Q
Tue Aug 22, 2023 9:58 pm
Show Us Your Dobs

Last post by StarBru « Sun Aug 06, 2023 11:20 pm
Replies: 10
by Mike Q » Sun Jul 09, 2023 10:31 pm

First post

Show em off folks. Lets see your light buckets. Here is my 10 inch and 16 inch Orion dobs

Last post

I converted my new/old stock Meade LXD-55 10 Schmidt Newtonian into a Dob after almost ruining the undersized LXD-55 mount and because I can't afford...

10 Replies

405 Views

Last post by StarBru
Sun Aug 06, 2023 11:20 pm
Dob Mods

Last post by 10538 « Tue Aug 01, 2023 1:02 am
Replies: 12
by Mike Q » Mon Jul 10, 2023 11:19 pm

First post

I think this is a good time to start what could become a very big thread. Lets talk about the mods that we have made to our reflectors, dobs or...

Last post

I usually don’t observe when the moon dominates the sky. Actually we haven’t seen the moon or anything else lately due to the storms coming through...

12 Replies

503 Views

Last post by 10538
Tue Aug 01, 2023 1:02 am
whats the largest F4 to F6 focal ratio scope money can buy?

Last post by Mike Q « Fri Jul 28, 2023 12:26 am
Replies: 15
by realflow100 » Sun Jun 28, 2020 1:10 pm

First post

I dont like the really long focal length scopes because it makes it really hard to locate a target and center it. and the requirement of an obscenely...

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Two things, first find darker skies. Light pollution is the enemy no matter what scope you have. Secondly you dont have to spend thousands on the...

15 Replies

9844 Views

Last post by Mike Q
Fri Jul 28, 2023 12:26 am
Shapestar 150mm f/2.8 Hyperbolic Newtonian Astrograph

Last post by Caddman « Mon May 29, 2023 12:52 am
Replies: 2
by Caddman » Sun May 28, 2023 6:10 pm

First post

Hello,
Has anybody had any experience with the Sharpstar 150mm f/2.8 atrograph?

I'm looking at purchasing one. I'm looking for a fast lightweight...

Last post

I have a little Sharpstar 61 EDPHII that I bought from Agena Astro several years ago. Turned out that the main objective was flawed. I contacted...

2 Replies

306 Views

Last post by Caddman
Mon May 29, 2023 12:52 am
Beginners Telescope

Last post by JayTee « Wed Apr 19, 2023 12:31 am
Replies: 11
by BRT » Wed Mar 08, 2023 12:50 am

First post

I am just starting in telescopes and would like to know what a good beginners telescope would be.

Thsnks!

mod edited, please do not post personal...

Last post

If you have existing screws (the other screws in the mirror cell) take them to ACE Hardware and use their screw sizer to determine what size they...

11 Replies

844 Views

Last post by JayTee
Wed Apr 19, 2023 12:31 am
John Dobson / building telescopes

Last post by Frankskywatcher « Fri Mar 24, 2023 5:05 pm
Replies: 9
by Frankskywatcher » Wed Mar 22, 2023 2:15 am

First post

John Dobson a man so far ahead of his time.

Last post

Thanks everyone for the great comments and insights!
He is what changed my mind from buying an 8” to getting the 10” when I heard him say in an...

9 Replies

773 Views

Last post by Frankskywatcher
Fri Mar 24, 2023 5:05 pm
Catseye upgrade

Last post by UkDave « Sun Feb 26, 2023 9:49 am

by UkDave » Sun Feb 26, 2023 9:49 am

Has anyone upgraded their 8” f5 Newtonian to be used with the cateseye system if so do you think it was worth doing , thoughts please .

Regards Dave

0 Replies

363 Views

Last post by UkDave
Sun Feb 26, 2023 9:49 am
Telescope Rings for Starfinder 12.5"

Last post by johnyjf « Sat Feb 11, 2023 7:00 pm
Replies: 1
by johnyjf » Sat Feb 11, 2023 5:13 pm

First post

I have just purchased a Meade Starfinder 12.5 OTA. The Focuser is rubbish but I have a replacement in process. I would like to use this scope with an...

Last post

I just found the right thing on Orion Optics UK website, ordered and all. So ignore this request please!

1 Replies

361 Views

Last post by johnyjf
Sat Feb 11, 2023 7:00 pm
Purchasing a Big Dob

Last post by Makuser « Tue Jan 10, 2023 10:40 am
Replies: 15
by Ted » Fri Dec 30, 2022 4:12 am

First post

I remember in the early '70s seeing Ursa Minor in its entirety with my bare (young) eyes in our back garden. At the time I thought that was normal....

Last post

Hi Ted. That is one beautiful light bucket and it looks to be well designed. Congratulations on your new Dob telescope Ted, best wishes for some...

15 Replies

1143 Views

Last post by Makuser
Tue Jan 10, 2023 10:40 am
Mirror cleaning

Last post by KathyNS « Tue Nov 15, 2022 1:07 pm
Replies: 21
by KathyNS » Mon Oct 31, 2022 8:20 pm
1

2
First post

I tried imaging M-45, the Pleiades, last night, but the haloes on the bright stars were out of control. Time to clean the mirror, methinks. Once...

Last post

I've read about pinched optics and never really understood it. Are they saying that you actually distort the glass? That's hard to believe...

It's...
21 Replies

1388 Views

Last post by KathyNS
Tue Nov 15, 2022 1:07 pm
Setup for newbie

Last post by Lady Fraktor « Sat Nov 12, 2022 4:50 pm
Replies: 9
by Cliffjg » Mon Nov 07, 2022 12:53 pm

First post

Just got Celestron astromaster 114 eq.
I do not see how to put an eyepiece on or how to take off the lens cover (seriously)
Any help is appreciated

Last post

Your telescope should have come with a 20mm and 10mm eyepieces.
Try the 20mm first, this is the lower power eyepiece. The larger the number the lower...

9 Replies

836 Views

Last post by Lady Fraktor
Sat Nov 12, 2022 4:50 pm
Collimation screws

Last post by KathyNS « Wed Nov 02, 2022 10:35 pm
Replies: 5
by KathyNS » Tue Nov 01, 2022 4:01 pm

First post

I had my first good look at the collimation screws when I had the mirror cell out for cleaning yesterday. I always thought that the screws had a very...

Last post

I don't know if this will help, but here is a picture of my mirror cell looking at it from the back of the telescope.
The straight screws lock the...

5 Replies

652 Views

Last post by KathyNS
Wed Nov 02, 2022 10:35 pm
Overpriced Unistellar Gets Another Plug (not from me)

Last post by BigKahuna « Fri Oct 21, 2022 2:01 am
Replies: 24
by helicon » Mon Jun 14, 2021 2:31 pm
1

2
First post

In year of isolation, this $3,000 telescope may have changed citizen astronomy forever

Last post

One of my cub members has the 2nd generation unit and brings it to star parties for public showing. For this application it always has a crowd. Even...
24 Replies

22628 Views

Last post by BigKahuna
Fri Oct 21, 2022 2:01 am
Is "DURABRAND" telescope maker? Please help

Last post by SkyHiker « Sun Jul 03, 2022 3:51 am
Replies: 17
by gauraog » Fri Jun 24, 2022 11:17 am

First post

I'm new here. Im buying my first telescope from olx. Maker is Durabrand. I never heard of. Also there are no parameters mentioned on Tube about focal...

Last post

(BTW: a question to Henk: what color have you seen in M51 etc. through a big dob? Was it the red of star-forming regions? )

No it was blueish green...

17 Replies

1723 Views

Last post by SkyHiker
Sun Jul 03, 2022 3:51 am
Importance of capping the OTA after a session

Last post by Aratus « Thu Jun 23, 2022 8:31 am
Replies: 6
by KathyNS » Tue Jun 21, 2022 11:18 pm

First post

I have gotten lazy about capping my scope after a session if there are more clear nights in the forecast. Each cap or uncap requires a trip out to...

Last post

If you have never had a cap, or lost one, a very cheap replacement is one of those plastic cardboard tube caps used to mail posters and things.

6 Replies

919 Views

Last post by Aratus
Thu Jun 23, 2022 8:31 am
Telescope transportation

Last post by SkyHiker « Wed Mar 30, 2022 8:34 am
Replies: 8
by Marcelo F. » Mon Mar 28, 2022 3:04 pm

First post

I did a quick search on telescope transportation and didn't find any topic dedicated to this specific subject in this forum (I could be wrong, in...

Last post

I use the 14 cylinder of my 12 Dob to store luggage. For that I cut a multiplex disc on a rope that I lower on to the mirror holders after I take the...

8 Replies

1698 Views

Last post by SkyHiker
Wed Mar 30, 2022 8:34 am
Look at this Dob 760mm😳

Last post by Lady Fraktor « Wed Feb 09, 2022 5:20 am
Replies: 14
by Frankskywatcher » Tue Feb 01, 2022 2:07 pm

First post

Check this out !

Last post

280mm is tiny, you need this one, 510mm (20 ) triplet.

At 331932.77 € + 20% DPH it is a steal :lol:

14 Replies

4249 Views

Last post by Lady Fraktor
Wed Feb 09, 2022 5:20 am
“Jones Bird” reflector modification

Last post by AstroBee « Mon Jan 17, 2022 6:29 am
Replies: 19
by Barnacle » Tue Dec 21, 2021 1:17 am

First post

I picked up one of these “notorious” short tube reflector telescopes some years ago.
scop.jpg
The specification is a 114mm diameter mirror, Focal...

Last post

Yes, That makes sense.
Thanks for the clarification.

19 Replies

29385 Views

Last post by AstroBee
Mon Jan 17, 2022 6:29 am
Anyone know where to buy a 6 inch dob?

Last post by Lady Fraktor « Wed Jan 05, 2022 9:35 pm
Replies: 14
by Shelby » Sun Dec 26, 2021 5:04 am

First post

I am on a quest to purchase a 6 inch dobsonian telescope. However, it seems that they are all sold out everywhere I look right now. The one I am most...

Last post

Do not pop the bubble wrap, that is where they put the extra cloud seeds.

14 Replies

23070 Views

Last post by Lady Fraktor
Wed Jan 05, 2022 9:35 pm
Refractordude Buys A Reflector Telescope

Last post by Refractordude « Tue Dec 07, 2021 12:43 am
Replies: 26
by Refractordude » Thu Nov 11, 2021 12:01 am
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2
First post

I got this scope that comes with an object finder app. The LT was easy to setup and very light to carry. However, I have an issue with the app. I...

Last post

Tried again but about ten degrees off target. Maybe it is the metal cross bar. Any help would be appreciated. Thanks all
26 Replies

18631 Views

Last post by Refractordude
Tue Dec 07, 2021 12:43 am
Dew on the Primary???

Last post by notFritzArgelander « Thu Dec 02, 2021 7:07 pm
Replies: 6
by helicon » Thu Dec 02, 2021 4:08 pm

First post

I had a good view of the Andromeda galaxy which I shared my sister and my nephew who were over for dinner last night. I set up the scope at 5:00 and...

Last post

Since my hair is thinning on top I don't need a hairdryer anymore....

Neither do I. What hair I have I keep close cropped. My hair drier is...

6 Replies

4724 Views

Last post by notFritzArgelander
Thu Dec 02, 2021 7:07 pm

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