Discuss reflector telescopes
Tasco 11RT
Replies: 6
by
LDW47 »
Thu Nov 25, 2021 3:12 am
First post
Has any one owned or used a Tasco Model 11RT scope from the mid 80's ? I have a chance to buy one like new, incl an eq mount, for about $100 C but...
Last post
IMG_1325.JPG
Thanks have not posted for some time so probably forgot !
6 Replies
4979 Views
Last post by Richard
Mon Nov 29, 2021 2:35 pm
Took the Bait: Bresser 208mm Newtonian
Replies: 13
by
mikemarotta »
Tue Jul 13, 2021 8:43 pm
First post
I received a marketing email from Explore Scientific on recent returns for sale. The price for this Bresser branded Newtonian was low enough that I...
Last post
It's been a few months since the last post in this thread. I just received my 208 last week. How has yours been? How's the collimation process on it?
13 Replies
12478 Views
Last post by j21blackjack
Fri Nov 05, 2021 5:49 pm
8 Inch Dob Vs 10 Inch Dob
Replies: 10
by
Refractordude »
Thu Oct 28, 2021 1:27 am
First post
From your experience is it worth getting a ten inch dob rather than an eight inch dob? Here is an article covering the topic.
I like to know...
Last post
BTW, I currently have a 12 dob, and it takes up less room than my 4 refractor in the car. I redesigned my 10 dob to be a truss-type rather than the...
10 Replies
6657 Views
Last post by DeanD
Thu Oct 28, 2021 10:47 pm
What Do You Know About This DOB?
Replies: 12
by
Refractordude »
Sun Oct 03, 2021 12:58 am
First post
Thanks all
Last post
But let's consider 'as you can handle' part. 10 DOB is substantially larger, heavier and more time and hustle to set up compared to your 6 frac....
12 Replies
6825 Views
Last post by Bigzmey
Wed Oct 06, 2021 4:51 pm
Sometimes I zone out
Replies: 2
by
Chich »
Sun May 23, 2021 3:03 am
First post
Was scrolling through FB. A lot of astronomy related postes when I came upon this. First thought was There are better ways to clean your primary...
Last post
Visualize some person suspended above the mirror of one of the really big telescopes with a specially made version of something like that. :Think:
2 Replies
3170 Views
Last post by MistrBadgr
Sat Jul 10, 2021 6:47 pm
Diagonal Size For A Simple Newtonian
Replies: 8
by
JayTee »
Fri Jul 09, 2021 1:16 am
First post
Hi all,
I want to upgrade the 1.25 focuser on my 8 f/7.5 Newtonian to a 2 focuser. My question is, will my current diagonal mirror minor axis size...
Last post
Along with the helpful link that nFA provided (thanks), I have used that in the past but I find the multitude of inputs to be a bit confusing so I...
8 Replies
5130 Views
Last post by notFritzArgelander
Fri Jul 09, 2021 8:34 pm
Digging out the old Newt!
Replies: 18
by
Gordon »
Thu Apr 15, 2021 8:08 pm
First post
For many years I used a 10 inch Skywatcher as my primary telescope, a couple of years back I purchased a ES80ed-cf refractor to do most of my imaging...
Last post
10 on an Atlas, yep that's a big boy! :lol:
18 Replies
12000 Views
Last post by Ylem
Fri Jul 02, 2021 10:08 pm
Bird-Jones (Jones-Bird)
Replies: 16
by
mikemarotta »
Sun Dec 29, 2019 2:31 pm
First post
Most Newtonian reflectors have parabolic mirrors. A Bird-Jones has a spherical mirror because they are easier to manufacture. The spherical aberation...
Last post
The faster the mirror the more likely you will have coma either photographically or visually.
It is just inherent to the design be it parabolic or...
16 Replies
16989 Views
Last post by Lady Fraktor
Fri Jul 02, 2021 8:30 pm
Zhumell 12 inch dob...primary mirror question
Replies: 5
by
Cosmos63 »
Sun Jun 06, 2021 10:16 pm
First post
Haven't had it long and yet to use it due to needing a base, which I'm building. I got it for a bargain-cannot-refuse price, new in the box. I now...
Last post
As with nFA and Helicon, no glue and no pinches. :)
Years ago I even attached a dew heater to the back of my primary and reisntalled it into the...
5 Replies
3650 Views
Last post by omeek
Wed Jun 16, 2021 11:14 pm
Bob’s knobs & Corrector plate
Replies: 15
by
Greenman »
Wed Sep 16, 2020 11:18 am
First post
Well the upgrade to the knobs was simple, but looking at the corrector plate (I'm normally at the other end) it is dirty and there are signs of...
Last post
Cleaning optics is of course up to the user but I go by the saying, if in doubt about it, wait another year then check again.
Other than a...
15 Replies
9740 Views
Last post by Lady Fraktor
Thu Jun 03, 2021 8:22 pm
Mirror Resurface?
Replies: 10
by
KingNothing13 »
Wed Aug 05, 2020 12:58 pm
First post
I will preface this by saying I know my mirror is in NO need of resurfacing, and I do NOT plan on having it resurfaces any time soon.
But having...
Last post
I imagine proper recoating by a world class optics producer would be benifical.
Either way I do like the owners attitude:
There is brightness,...
10 Replies
7568 Views
Last post by Lady Fraktor
Thu Jun 03, 2021 7:50 pm
Is A No Need To Collimate Newtonian Telescope Possible?
Replies: 12
by
Refractordude »
Thu Mar 11, 2021 11:06 pm
First post
Did not think this was possible until now. Perhaps marketing hype or I am not reading it correctly. Left click the image.
Last post
F6 & slower solid tube Newtonians need less collimating. 10 F6, 8 F6 & 6 F8 are mine. I also have 10 F5 & 12 F5 solid tube scopes, not too much...
12 Replies
6940 Views
Last post by 25585
Tue Jun 01, 2021 2:31 pm
My 6 inch f/5 reflector
Replies: 10
by
MistrBadgr »
Wed May 05, 2021 1:01 am
First post
Bigzmey liked my 60mm refractor with multiple finders on it so much, that as I was putting multiple finders on my 6 inch reflector I thought I would...
Last post
I have tried quite few varieties of red dots and reflex sights and ironically the cheapest plain red dot works best for me. I buy them in bulk from...
10 Replies
5510 Views
Last post by Bigzmey
Mon May 10, 2021 10:36 pm
Starblast 6 focuser
Replies: 9
by
Seadawg216 »
Wed Feb 17, 2021 9:11 pm
First post
Everything I've researched regarding the Starblast 6 indicates that the weakest part is the plastic focuser. Is it that bad where it would be a...
Last post
I take it that it would fit & be relatively easy to replace?
I would check with Agena directly, they sell a lot of focusers.
I do know for a fact...
9 Replies
5407 Views
Last post by Bigzmey
Fri Feb 19, 2021 1:28 am
What Do You Think About This?
Replies: 1
by
Refractordude »
Mon Feb 15, 2021 4:56 am
First post
He is getting more mag by decreasing the aperture and increasing the focal ratio. Left Click the image.
Last post
He is describing a side effect as if it were a main effect.
By masking the aperture he decreases the effects of external seeing. No wonder he sees...
1 Replies
2686 Views
Last post by John Baars
Mon Feb 15, 2021 11:08 am
6" old usa vs. new gso
Replies: 4
by
Jones »
Tue Nov 17, 2020 2:43 am
First post
Comparison of 6 ers Edmund f8 40 yrs. old vs. GSO f6 just built.
The Edmund is nearly the best 6 ever looked thru, and the GSO uses a claimed 1/10th...
Last post
I had the old red tube Edmund Super Space Conqueror - a 4 1/4 reflector. At f/10 it provided good views of the planets with its spherical mirror....
4 Replies
4072 Views
Last post by helicon
Thu Nov 19, 2020 2:36 pm
Agena Astro certified mirrors
Replies: 8
by
Jones »
Mon Oct 05, 2020 5:11 am
First post
Agena has started a new service of testing their photo newtonians to be diffraction limited before they ship out. I asked them if they would do a...
Last post
The 6 f/6 with Agena certified mirror is ready to go.
Of course this is Arizona and the skys are not cloudy all nite, no California fire smoke...
8 Replies
6263 Views
Last post by Jones
Sun Nov 15, 2020 9:56 pm
Does my scope have light leaks?
Replies: 4
by
KathyNS »
Mon Oct 19, 2020 3:01 pm
First post
Nothing serious. Just a question that I wasn't setting out to answer, but that I accidentally answered anyway.
I was noticing some hot pixels that...
Last post
My newtonian astrograph has more leaks than a sieve.
Main source is from behind the primary mirror believe it or not.
4 Replies
3980 Views
Last post by UlteriorModem
Mon Oct 19, 2020 5:32 pm
new recommendations and opinions
Replies: 7
by
tomthetank »
Sun Sep 06, 2020 12:58 am
First post
Hi just had time to organize this better new to astrophotography received a lot of info within the last day from people on forum. This is what id...
Last post
Remember, most commercial Newtonian telescopes will not bring the camera close enough to the mirror to give you an in focus image. Only when it is...
7 Replies
4999 Views
Last post by JayTee
Sun Sep 06, 2020 8:49 pm
Focusing Issue
Replies: 8
by
KingNothing13 »
Tue Sep 01, 2020 9:42 pm
First post
I mentioned briefly in my short report about using the Nexus II for the first time a focusing issue with my AD10.
Here's the history:
Up until 2-3...
Last post
Are those trees nearby? A close by object needs far more outward travel of the focusser than an object at infinity, like a star.
They are...
8 Replies
3938 Views
Last post by KingNothing13
Wed Sep 02, 2020 10:24 pm
CELESTRON STARSENSE EXPLORER
Replies: 29
by
mistac »
Thu Jun 18, 2020 3:57 pm
First post
Hi, first post as a Newby. I’ve been doing a little bit of basic research as I’m interested in getting a telescope. As I’m a complete beginner I was...
Last post
Thanks - it is an iphone 8 and compatible as I had checked that before purchasing. I think the alignment process is now ok and I did manage to get...
29 Replies
14926 Views
Last post by The Happy Parrot
Sun Aug 02, 2020 12:22 pm
Difference between SkyWatcher Explorer 130 RA and 130M?
Replies: 26
by
flord.lord »
Tue Jul 21, 2020 10:28 pm
First post
Hi,
The two scopes in the title are:
And
I was a bit confused by this:
- Is the only difference the multi-speed handset, and DC...
Last post
switched over to the EQ mount. Took a while before I learned how to use an EQ.
This basically summarises last night :? !
Got rough polar...
26 Replies
8315 Views
Last post by terrynak
Sun Jul 26, 2020 9:22 am
a nice suprise
Replies: 5
by
rickolson62 »
Sat Jul 11, 2020 12:54 pm
First post
hello folks! my brother in law expressed interest in viewing so a couple of years ago i got him an old orion 6 dob, deep space explorer
for...
Last post
thanks guys! i did some reading and it turns out these were pre china and over seen by Terry Ostahowski at Discovery who made the optics for orion at...
5 Replies
2343 Views
Last post by rickolson62
Sun Jul 12, 2020 2:43 pm
Will the SkyWatcher Supatrak mount fit the SkyWatcher 130/650 Newt?
Replies: 3
by
flord.lord »
Fri Jul 10, 2020 7:58 am
First post
Hi,
I have an old Skywatcher Supatrak mount lying around. I've noticed it fits with the normal, black SkyWatcher dovetail bar; I've attached images...
Last post
I have a 130PDS with the same green bar and it fits. There is some play but once tightened up it works just fine.
Only way to know for sure is to...
3 Replies
1880 Views
Last post by KingClinton
Fri Jul 10, 2020 11:09 am
Moonliting a truss dob
Replies: 5
by
Kanadalainen »
Sat May 23, 2020 1:03 pm
First post
I had a CR2 Moonlite focuser on my XT10, and that scope was traded (with its stock focuser) for a mount... so I had an extra focuser.
The helical...
Last post
Cool! I also have a moonlite focuser.
They are great, simple Crayfords. Beautifully machined to close tolerances.
That is a clear and lucid...
5 Replies
2663 Views
Last post by Kanadalainen
Sat Jun 20, 2020 10:38 pm
Forum permissions
You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot post attachments in this forum