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Last post

Why not helical focusers?

Last post by JayTee « Fri Sep 02, 2022 8:12 pm
Replies: 2
by pakarinen » Fri Sep 02, 2022 10:56 am

First post

I'm curious why almost all scopes come with R&P or Crayford-style focusers as opposed to helical. Helical are much lighter, less complex and...

Last post

The Telescopics focuser installed on my 8 Newt (circa 1972) is an R & P but the Rack portion is setup up to also function as a helical focuser for...

2 Replies

517 Views

Last post by JayTee
Fri Sep 02, 2022 8:12 pm
I want but not necessarily useful accessories

Last post by notFritzArgelander « Tue Aug 30, 2022 6:11 pm
Replies: 40
by Lady Fraktor » Wed Jun 08, 2022 7:43 pm
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First post

There are many different bits available to astronomers but sometimes you can get caught in the I want but do I really need it scenario.

My personal...

Last post

Yep, I think I'm going back to the KK Fujiyamas idea... I just had a few hours out initially viewing Jupiter with the BVs in the 4 refractor. It...
40 Replies

3978 Views

Last post by notFritzArgelander
Tue Aug 30, 2022 6:11 pm
Low price dew heaters

Last post by DeanD « Mon Aug 15, 2022 5:33 am
Replies: 4
by DeanD » Thu Aug 11, 2022 10:58 am

First post

Hi Folks,
I just grabbed a couple of Dew Heater Strips , with a 3-speed ;) controller and a strap on heater for up to 110mm diameter telescopes at a...

Last post

Interesting Dean, hopefully they work well for you.

My only thought is that with only the 3 position switch the lens will end up being to cool or to...

4 Replies

604 Views

Last post by DeanD
Mon Aug 15, 2022 5:33 am
DIY Repair Question

Last post by JayTee « Sun Aug 07, 2022 10:20 pm
Replies: 5
by JayTee » Sun Aug 07, 2022 5:25 am

First post

I have a SLIK U-212 tripod and the top part of the head has become unglued and then lost. What would be a good replacement material for the mounting...

Last post

Actually, I went a little bit crazy and got this instead. Same thought process but this material is just a bit thicker....

5 Replies

675 Views

Last post by JayTee
Sun Aug 07, 2022 10:20 pm
Is this barlow any good?

Last post by Lady Fraktor « Thu Aug 04, 2022 2:55 am
Replies: 5
by Thefatkitty » Wed Aug 03, 2022 7:37 pm

First post

Hey all, I'm hoping you knowledgeable folk can help me out a bit here :D

I recently noticed an ad on Kijiji, a Canadian online buy & sell.

It's...

Last post

From my perspective, if you are questioning yourself just save some more and get exactly what you want.

If you are just looking for a good price on...

5 Replies

682 Views

Last post by Lady Fraktor
Thu Aug 04, 2022 2:55 am
New reflex finder from ES

Last post by KingNothing13 « Fri Jun 24, 2022 10:11 pm
Replies: 8
by Bigzmey » Thu Jun 23, 2022 10:28 pm

First post

Interesting new product from ES. A hybrid between telrad and red dot.

I have not tried it, but just looking at the photos there are some nice...

Last post

I was there for the fielding and testing (1972/73) of the first prototype of the Telrad with inventor Steve Kufeld (he was a member of the LAAS, as...

8 Replies

1118 Views

Last post by KingNothing13
Fri Jun 24, 2022 10:11 pm
For those who want to display their astro stuff in style

Last post by JayTee « Sat Jun 11, 2022 5:26 am
Replies: 8
by Bigzmey » Thu Jun 09, 2022 5:25 pm

First post

For those who want to display their astro stuff in style and also protect from humidity and dust. :D

Last post

I think you’ve hit on a better idea for a less expensive wine fridge. Check this out.

8 Replies

1441 Views

Last post by JayTee
Sat Jun 11, 2022 5:26 am
just got a flattener. improvement but not perfect. left side blurry? Tilt?

Last post by realflow100 « Mon May 30, 2022 2:05 pm
Replies: 5
by realflow100 » Fri May 27, 2022 5:36 pm

First post

rotated the objective lens assembly to see if it changes but it doesnt. its still on the left side. I shimmed the focuser to try to make it not...

Last post

I tried increasing the spacing a LOT. a millimeter at a time.
it didnt really change the edges hardly at all until about 4mm. where it looked...

5 Replies

856 Views

Last post by realflow100
Mon May 30, 2022 2:05 pm
Budget hard cases

Last post by smeyer8015 « Wed May 25, 2022 9:33 pm

by smeyer8015 » Wed May 25, 2022 9:33 pm

0 Replies

454 Views

Last post by smeyer8015
Wed May 25, 2022 9:33 pm
prism vs dielectric diagonals? false color sharpness contrast brightness ect?

Last post by realflow100 « Tue May 17, 2022 6:39 pm
Replies: 9
by realflow100 » Sat May 14, 2022 10:55 am

First post

I have a dielectric mirror diagonal. and a prism erect image diagonal
and there seems to be a weird tradeoff between them

dielectric seems sharpest...

Last post

Yeah I'm quite surprised it has such low aberrations BESIDES the CA
no coma spherical astigmatism ect. less thjan 1/10 wave even very likely. and I...

9 Replies

961 Views

Last post by realflow100
Tue May 17, 2022 6:39 pm
Upgrading my diagonal - need help

Last post by Bigzmey « Fri Apr 29, 2022 6:08 pm
Replies: 22
by West83 » Sun Apr 03, 2022 10:29 pm
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First post

Hi all,

So I am searching for a diagonal to replace the very old stock diagonal on my celestron fs80.

I plan on upgrading the focuser as well, but...

Last post

Congrats on the new diagonal! I had good experience with Altair brand.
22 Replies

2944 Views

Last post by Bigzmey
Fri Apr 29, 2022 6:08 pm
Artesky Ultra Guide MKII 60 mm Guide-Scope?

Last post by pakarinen « Sat Apr 16, 2022 2:56 pm

by pakarinen » Sat Apr 16, 2022 2:56 pm

Anybody know if this can take a diagonal (RACI) and a regular EP? I could use an upgraded finder for my 102mm, but I don't want a straight through...

0 Replies

666 Views

Last post by pakarinen
Sat Apr 16, 2022 2:56 pm
filters, filters and filters.

Last post by Bigzmey « Sat Mar 26, 2022 9:35 pm
Replies: 20
by messier 111 » Mon Mar 14, 2022 4:02 pm
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First post

hi all ,

I already have a filter, Celestron 94123 UHC/LPR filter
which I used with my 120mm.

now I was wondering if it was worth buying a filter,...

Last post

I hear you Bill. :) My first option is always to see nebulae in their natural environment. If that fails I push for it with filters. I would rather...
20 Replies

4042 Views

Last post by Bigzmey
Sat Mar 26, 2022 9:35 pm
'New' Vernonscope barlow and diagonal

Last post by Lady Fraktor « Tue Mar 08, 2022 5:32 pm

by Lady Fraktor » Tue Mar 08, 2022 5:32 pm

I see that the gold diagonal has been re-issued and the 2.4 Dakin has been redesigned to become a 2 1.5x as well as the standard 1.25 2.4x...

0 Replies

729 Views

Last post by Lady Fraktor
Tue Mar 08, 2022 5:32 pm
Good LP filters for visual?

Last post by turboscrew « Mon Feb 28, 2022 8:07 pm
Replies: 12
by turboscrew » Sun Feb 27, 2022 4:21 pm

First post

Last night I finally got to try out my Optolong UHC with M42, and it helped. The effect could have been a bit stronger, though. But as a side effect,...

Last post

Checked from 3 EU area stores, for Astronomik, Lumicon, Chroma, DMG and Tele Vue 1.25 UHCs.
Only this is available at the moment.

I think Altair...

12 Replies

2134 Views

Last post by turboscrew
Mon Feb 28, 2022 8:07 pm
where to get Crayford focuser repaired

Last post by John999R « Sat Feb 19, 2022 7:29 am
Replies: 7
by John999R » Thu Feb 10, 2022 9:45 am

First post

I was having issues trying to get my new Advanced ZWO focuser to work. I tried many times, but concluded it was likely defective. However, I decided...

Last post

Oh dear another toothless problem
These focusers rely on friction , if one adjust a bolt here and there then you will mess it up unless you know...

7 Replies

1391 Views

Last post by John999R
Sat Feb 19, 2022 7:29 am
Orion 6x30 RACI replacement stalk?

Last post by JayTee « Sun Jan 23, 2022 1:00 am
Replies: 3
by pakarinen » Fri Jan 21, 2022 2:25 pm

First post

I have an Orion 6x30 that's a nice little finder - inexpensive and surprisingly sharp optics. But the stalk is about 6 inches long so it sticks way...

Last post

This might work for you.

3 Replies

8842 Views

Last post by JayTee
Sun Jan 23, 2022 1:00 am
New Diagonal Mirror

Last post by helicon « Wed Jan 19, 2022 3:44 pm
Replies: 3
by Jones » Fri Dec 24, 2021 8:10 pm

First post

Picked up this Celestron Diagonal in a box of parts off ebay.
The mirror did not look so good, but with a minor diameter of 30mm could not find a...

Last post

Nice find and hopefully by now you have made use of the new parts.

3 Replies

15045 Views

Last post by helicon
Wed Jan 19, 2022 3:44 pm
GPS replacement for Autostar????

Last post by Piet Le Roux « Thu Dec 23, 2021 2:08 pm
Replies: 1
by KCC07 » Wed Dec 22, 2021 12:36 pm

First post

Good morning...my first post so bear with me.

I have an ETX-125 that I like very much. I haven't used it in quite a while because my autostar is not...

Last post

Good day Ken,
You can replace the Autostar with a Audiostar controller but as far as I know there's no stock available and on the Meade site it was...

1 Replies

3541 Views

Last post by Piet Le Roux
Thu Dec 23, 2021 2:08 pm
looking for a new cc

Last post by SkyHiker « Sat Dec 11, 2021 3:48 am
Replies: 10
by yobbo89 » Wed Sep 29, 2021 2:35 pm

First post

any chance anyone has a 2.5'' cc and a moonlight ?

thinking about getting this , my moon light does have a 68 mm x1mm female thread , i'm guessing...

Last post

Great image Rob, glad it works out that well! Yea the illumination looks a bit off center but not by much.

10 Replies

12525 Views

Last post by SkyHiker
Sat Dec 11, 2021 3:48 am
Electronic Focuser for the Explore Scientific’s ED140 FPL53 140mm f/6.5

Last post by NoDarkSkies « Tue Nov 16, 2021 5:18 pm
Replies: 3
by NoDarkSkies » Wed Dec 23, 2020 3:07 am

First post

Looking for a Electronic Focuser for the Explore Scientific’s ED140 FPL53 140mm f/6.5

Anyone know what Electronic Focuser can be used on this...

Last post

Just an update to the Focus unit for this Telescope;
You can use the ZWO EAF using the PegasusAstro Motor Coupler Set 3mm-8mm (6PCS) PEG-MOT-COUPLSET

3 Replies

5894 Views

Last post by NoDarkSkies
Tue Nov 16, 2021 5:18 pm
Dew heater temperature?

Last post by Chich « Mon Nov 08, 2021 5:52 am
Replies: 4
by Chich » Sun Nov 07, 2021 5:29 am

First post

I found a lens heater that runs off USB. I just tried a 'dry run' and it gets up to 39 degrees after a few minutes. The scant paperwork with it says...

Last post

Thanks for the replies. It has no controller, but I can make one for it. Not sure why it would warm up so much. I saw it up online and took a...

4 Replies

4674 Views

Last post by Chich
Mon Nov 08, 2021 5:52 am
My New Portable Battery

Last post by AstroBee « Mon Nov 01, 2021 11:18 pm
Replies: 8
by JayTee » Thu Sep 09, 2021 11:59 pm

First post

Just picked this up from Harbor Freight yesterday. It's the Viking 12V Lithium Ion Jump Starter. It was on sale for $75. It's compact it's light...

Last post

Wow, 30Amp hours per night!?
I don't know much about AP, so that's that's a shocker to me 😆 but yeah I can see an on board computer and accessories...

8 Replies

6731 Views

Last post by AstroBee
Mon Nov 01, 2021 11:18 pm
Encoders...

Last post by OzEclipse « Sat Oct 23, 2021 7:47 pm
Replies: 11
by WilliamPaolini » Sat Oct 09, 2021 1:01 am

First post

What is the consensus for what the accuracy should be for good encoders for a mount? +/- what fraction of a degree?

Last post

As a practical guide, I purchased an ATM dob built by another member on this site.
It's an 18 f5.5, 2500mm focal length.
1 degree field in a Nagler...

11 Replies

8406 Views

Last post by OzEclipse
Sat Oct 23, 2021 7:47 pm
Light shield for an observing site?

Last post by astrowolf67 « Thu Oct 14, 2021 10:36 pm
Replies: 23
by notFritzArgelander » Sat Aug 28, 2021 6:43 am
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First post

Does anyone know if a portable light screen product exists? I've found these so far.

But I had in mind more of a portable wall rather...

Last post

Here is a light block wall I made from PVC, and a cheap Harbor Freight tarp. It folds in half, to store in a shed, but, with some creative thinking,...
23 Replies

16892 Views

Last post by astrowolf67
Thu Oct 14, 2021 10:36 pm

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