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1.25" Prism Comparison

Last post by Shorty Barlow « Wed Sep 07, 2022 7:39 pm
Replies: 4
by Shorty Barlow » Wed Sep 07, 2022 8:23 am

First post

Above, left to right top row: Baader T2 2456095 Zeiss specification, Baader T2 2456005K. Left to right bottom row: Celestron 94115-A, Takahashi...

Last post

A nice collection of diagonals SB! Over the years I have developed the same approach, matching diagonals to the scopes and type of targets. So, all...

4 Replies

724 Views

Last post by Shorty Barlow
Wed Sep 07, 2022 7:39 pm
2" Dielectric Comparison

Last post by Shorty Barlow « Tue Sep 06, 2022 1:49 am
Replies: 4
by Shorty Barlow » Mon Sep 05, 2022 11:43 pm

First post

Above, left to right top row: Tele Vue Everbrite, Baader Planetarium ClickLock. Left to right bottom row: Sky-Watcher, Altair Astro Posilock.

At...

Last post

thx .

You're welcome.

4 Replies

685 Views

Last post by Shorty Barlow
Tue Sep 06, 2022 1:49 am
The 90° Amici Prism Diagonal

Last post by Shorty Barlow « Mon Sep 05, 2022 6:16 pm
Replies: 6
by Shorty Barlow » Mon Sep 05, 2022 5:10 pm

First post

The right-angled Amici roof prism, also referred to as a direct vision or erecting prism, was invented by the Italian astronomer Giovanni Amici...

Last post

Nice review SB! Glad to see you back. So, if you to pick one 1.25 Amici prism with the best performance to price ratio, what that would be?

Thanks...

6 Replies

987 Views

Last post by Shorty Barlow
Mon Sep 05, 2022 6:16 pm
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

546 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

4346 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

655 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

749 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

740 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

1185 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

1515 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

910 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

469 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

1042 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

3151 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

695 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

4222 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

750 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

2228 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

1447 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

8885 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

15084 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

3572 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

12625 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

5937 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

4731 Views

Last post by Chich
Mon Nov 08, 2021 5:52 am

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