Eyepieces

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Mystery 1.25" 25 or 24mm reverse kellner/RKE eyepiece?

Last post by realflow100 « Tue Nov 23, 2021 5:24 pm
Replies: 4
by realflow100 » Thu Nov 18, 2021 11:02 am

First post

Says plossl 17mm on the side. but the field of view is fairly wide. and the focal length very well matches a 24mm eyepiece. (4mm approximately exit...

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Thats a bummer. its not a particularly useful eyepiece :(
the eye relief is too short to be comfortable for me (I really need very long like 20-25mm...

4 Replies

4611 Views

Last post by realflow100
Tue Nov 23, 2021 5:24 pm
Show us your planetary eyepieces!

Last post by Highburymark « Fri Nov 19, 2021 6:47 pm
Replies: 32
by WilliamPaolini » Tue Oct 19, 2021 8:47 pm
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Planetary Eyepieces 2021.jpg

Am curious what others here typically use for planetary observation. Of course any eyepiece will do, but depending on...

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FEA62852-6C7B-413C-BB64-13771A728745.jpeg
E24EB46E-4ECF-4097-9940-75179535510D.jpeg
Love these three TOEs for highest magnifications. For...
32 Replies

22271 Views

Last post by Highburymark
Fri Nov 19, 2021 6:47 pm
ASTRO BERLIN ORTH, Another missing link in the Evolution Tree of Eyepieces

Last post by j.gardavsky « Wed Oct 27, 2021 9:38 am
Replies: 9
by j.gardavsky » Sat Sep 11, 2021 10:14 am

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Hello all,

because of my curiosity, I have added to my collection of the astronomy eyepieces this ortho,

Astro Berlin Orth comp.jpg

This...

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Hello Bill,

these are very interesting eyepieces!

From outside, they are looking like from tactical optics - Flak, rifle scopes, theodolites,...

9 Replies

7287 Views

Last post by j.gardavsky
Wed Oct 27, 2021 9:38 am
What is your favourite AFOV?

Last post by Ylem « Sun Oct 17, 2021 9:45 pm
Replies: 43
by Lady Fraktor » Mon May 24, 2021 4:06 am
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My eyepiece collection ranges from about 10° up to 84° but my favourites are in the 30° to 45° range followed by 50° to 60°.
I enjoy planetary,...

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My favourite EP is my 24mm 68° Orion/Baader knock off of the famous TV 24 Pan :)
43 Replies

28943 Views

Last post by Ylem
Sun Oct 17, 2021 9:45 pm
How many eyepieces should we have?

Last post by Lady Fraktor « Fri Oct 01, 2021 5:29 pm
Replies: 84
by Seeker » Tue Jun 01, 2021 8:09 pm
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I am interested to know what others think on this subject.

My personal opinion is it's OK to own as many as we prefer to afford.

For many I assume...

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You should have enough to fill a medium sized barrow. ;)

It is all about variety!
84 Replies

49463 Views

Last post by Lady Fraktor
Fri Oct 01, 2021 5:29 pm
Wide angle eyepieces useful?

Last post by AntennaGuy « Wed Sep 22, 2021 11:34 pm
Replies: 6
by turboscrew » Tue Sep 21, 2021 9:59 pm

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I was setting up my CC using the full moon, and what I saw through my 26 mm 70° Omegon SWAN was mostly the secondary mirror. That made me thought...

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Hmm. You could use a moon filter on the eyepiece.
E.g.
Then, you just might be able to keep your pupil from shrinking too much.

6 Replies

3826 Views

Last post by AntennaGuy
Wed Sep 22, 2021 11:34 pm
Hensoldt, like Dollond eyepiece rising from the ashes of the 18th century

Last post by j.gardavsky « Wed Sep 15, 2021 9:01 pm
Replies: 2
by j.gardavsky » Wed Sep 15, 2021 10:33 am

First post

Hello all,

another blast from the old times of Dollond before 1800, is this achromatic doublet eyepiece, manufactured by Hensoldt for the rifle...

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Just curious, what would you think the AFOV of that eyepiece would be? I am guessing it would be relatively narrow, but resolution and contrast could...

2 Replies

2597 Views

Last post by j.gardavsky
Wed Sep 15, 2021 9:01 pm
Question about a Celestron Ploessel that is part silver and part black

Last post by Lady Fraktor « Thu Sep 09, 2021 6:49 pm
Replies: 8
by MistrBadgr » Wed Sep 08, 2021 5:34 pm

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I saw a 10mm Celestron Ploessel that has a silver side to the body with the normal red letters of a silver top. However, the top end around the eye...

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I did another look around but the only 10mm I could find had different style lettering and were marked as 10mm Plossl (reverse of this one) and were...

8 Replies

4053 Views

Last post by Lady Fraktor
Thu Sep 09, 2021 6:49 pm
Small focal length, small exit pupil, large AFOV

Last post by notFritzArgelander « Tue Sep 07, 2021 8:23 pm
Replies: 24
by 25585 » Thu Sep 02, 2021 3:07 pm
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As focal lengths get shorter, field stops and exit pupils smaller, do wider angle views dilute the amount of light being spread over a larger field...

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j.gardavsky it's a difficult problem to be sure. Communicating complex technical ideas in a marketing context is fraught with oversimplification. Now...
24 Replies

10738 Views

Last post by notFritzArgelander
Tue Sep 07, 2021 8:23 pm
Anyone Ever Compare The APM 30mm UFF Against Same Focal Length Eyepieces?

Last post by 25585 « Mon Sep 06, 2021 1:51 pm
Replies: 5
by Refractordude » Fri Aug 27, 2021 10:23 pm

First post

Same or close to 30mm focal length. What was your findings? Thanks all

Last post

I have a Celestron Ultima LX, and TS Expanse 22mm, same optics. I also have some 22mm LVWs.

Effective eye relief is similar. On the TS, I replaced...

5 Replies

5163 Views

Last post by 25585
Mon Sep 06, 2021 1:51 pm
Baader Morpheus.

Last post by Don Pensack « Sat Sep 04, 2021 4:53 am
Replies: 88
by NGC 1365 » Thu Dec 12, 2019 12:27 pm
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Bought two recently (9 and 17.5mm) and found them to be very immersive, and especially like the 76 deg AFOV. How do the others, in particular the...

Last post

Having used them in scopes from f/3.45 to f/7, I put the critical f/ratio of them around f/4.5.
If you have f/4.5 or faster, there are better...
88 Replies

49718 Views

Last post by Don Pensack
Sat Sep 04, 2021 4:53 am
Manufacturer locations

Last post by Don Pensack « Thu Sep 02, 2021 2:54 pm
Replies: 7
by Lady Fraktor » Wed Sep 01, 2021 6:15 pm

First post

I came across this advertisement earlier on the Rother Valley website.
I did not know Meade produced eyepieces in south america. Does anyone know...

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Meade Series 4000 Super Plössl was Japan up to 1994, Taiwan for a couple years, then China ever since.
They might have had a production run that was...

7 Replies

3541 Views

Last post by Don Pensack
Thu Sep 02, 2021 2:54 pm
Celestron Ultima 24mm

Last post by MistrBadgr « Wed Sep 01, 2021 1:25 am
Replies: 16
by MistrBadgr » Sun Aug 22, 2021 4:14 am

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Just FYI. Don't know if this is the right place for this, but I know people who are interested in eyepieces look here. There is a Celestron Ultima...

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I am beginning to think that about the Ultima 18mm. :) I looked back as far as I could on CN and AM to get an idea about how many a year show up. It...

16 Replies

8532 Views

Last post by MistrBadgr
Wed Sep 01, 2021 1:25 am
Baader Q-Barlow

Last post by j.gardavsky « Fri Aug 27, 2021 8:02 pm
Replies: 17
by JayTee » Tue Aug 24, 2021 8:13 pm

First post

Just wondering if anyone uses the Baader Q-Barlow 2.25x/1.3x ? Is it a decent barlow? Looking for opinions.

I ask because I am putting together an...

Last post

@j.gardavsky in my third photo, you can see the VIP element with its cell. Do you see those two holes? if you use a metal pin or one of the tools in...

17 Replies

7754 Views

Last post by j.gardavsky
Fri Aug 27, 2021 8:02 pm
Partial Celestron Ultima Set for Sale

Last post by Lady Fraktor « Thu Aug 26, 2021 4:08 am
Replies: 1
by MistrBadgr » Thu Aug 26, 2021 12:11 am

First post

There is a partial set of Celestron Ultimas (35mm down to 12.5mm), plus the 2x Barlow and an Axiom Eyepiece in a Case for sale on 8/25/2021 PM for...

Last post

Additional Information: These items are available through Cloudy Nights classified section.

1 Replies

1869 Views

Last post by Lady Fraktor
Thu Aug 26, 2021 4:08 am
Astroscan Acquision

Last post by MistrBadgr « Tue Aug 24, 2021 11:12 pm
Replies: 12
by MistrBadgr » Thu Aug 19, 2021 8:50 pm

First post

I responded to an ad I found on CN for an Orion Ultrascopic 20mm where the seller wanted a money order for $70 shipped. The ad had been there a bit,...

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Thanks, Don. I think I read in Bill Paolini's book about the 35mm having a stand out in space look to it like the Edmund Scientific 28mm RKE, just...

12 Replies

4958 Views

Last post by MistrBadgr
Tue Aug 24, 2021 11:12 pm
Thoughts on Celestron Ultima 18mm vs Baader Classic Ortho 18mm?

Last post by notFritzArgelander « Mon Aug 23, 2021 7:39 pm
Replies: 16
by MistrBadgr » Sun Aug 22, 2021 8:33 pm

First post

The Celestron Ultima eyepieces, if I understand things correctly, are a copy of a Massuyama designed Astroplan. The Astroplan originally came from...

Last post

I love my achromats :)
At the stated focal lengths either eyepiece will perform well.

Agreed. You really can't go wrong with either type. The...

16 Replies

2906 Views

Last post by notFritzArgelander
Mon Aug 23, 2021 7:39 pm
Parks Gold Series

Last post by KingNothing13 « Thu Aug 19, 2021 1:13 pm
Replies: 24
by MistrBadgr » Sun Aug 15, 2021 3:51 am
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I ran across the Parks Optical website the other day and saw that they were still selling their Gold and Silver Series eyepieces. I have been...

Last post

I wonder who keeps paying for their respective domain name renewals (with a domain name registrar)? If the domain name expires then that takes it out...
24 Replies

3815 Views

Last post by KingNothing13
Thu Aug 19, 2021 1:13 pm
New higher power eyepiece for my scope. Suggestions?

Last post by Jones « Tue Aug 03, 2021 2:54 am
Replies: 78
by turboscrew » Fri Jul 16, 2021 9:12 am
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I'm starting to get ready to the darker nights, and I think it's time for higher power eyepiece.
My scope is 12 /1200 mm F/4 and I'm looking for...

Last post

Yeah, I bought a 5mm Delite also. Been trying to get along with a 30 year old Kiyohara 5mm. Coatings are so much improved since then, the images are...
78 Replies

14758 Views

Last post by Jones
Tue Aug 03, 2021 2:54 am
New (to me) Pentax XL 40mm

Last post by Bigzmey « Thu Jul 22, 2021 11:02 pm
Replies: 12
by Bigzmey » Thu Jul 08, 2021 9:52 pm

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Pentax XWs are easily my favorite EP line of all time. A few months ago I have completed 1.25 XW lineup by acquiring 3.5mm and being eyeballing XW 2...

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Hi Andrey. I almost missed this thread. Congratulations on the new eyepieces that you have acquired. You are really going to enjoy these new...

12 Replies

2497 Views

Last post by Bigzmey
Thu Jul 22, 2021 11:02 pm
My Second Over $100 Eyepiece

Last post by Makuser « Thu Jul 22, 2021 8:51 pm
Replies: 5
by Refractordude » Tue Jul 20, 2021 4:08 am

First post

Just got back in from doing a shootout between my Meade 56mm plossl and my new Stellalyra 45mm Kitakaru RPL. The Stellalyra 45mm is just as sharp as...

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Hello RefractorDude. Congratulations on the new eyepiece and I enjoyed your shootout comments. There is nothing like having a wide range of focal...

5 Replies

1645 Views

Last post by Makuser
Thu Jul 22, 2021 8:51 pm
Kellner vs Ploessl

Last post by j.gardavsky « Sun Jul 18, 2021 7:15 pm
Replies: 21
by mikemarotta » Fri Jul 02, 2021 7:11 pm
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Is it just a matter of a fraction of a dollar in production costs?

What are the advantages and disadvantages?

Just for myself, I was...

Last post

Hello Thomas,

I have had my finger on the ordering buttom for the Vixen HR, but at the moment, most of my observings are with the low magnifications...
21 Replies

5422 Views

Last post by j.gardavsky
Sun Jul 18, 2021 7:15 pm
Apertura Wide Angle Eyepiece Kit for SCTs

Last post by SpyderwerX « Sat Jul 17, 2021 11:48 pm
Replies: 13
by Bigzmey » Thu Jul 15, 2021 6:59 pm

First post

Got a flyer from HPS advertising their new Apertura Wide Angle Eyepiece Kit for SCTs.

Generally, I am not big fan of kits, you almost always end...

Last post

I tend to space them somewhat tightly starting on the higher mag end, depending on which scope I'm using, target, and how far I can push the sky &...

13 Replies

3276 Views

Last post by SpyderwerX
Sat Jul 17, 2021 11:48 pm
Comparison of three 6mm eyepieces

Last post by John Fitzgerald « Mon Jul 12, 2021 9:35 pm
Replies: 3
by John Fitzgerald » Sun Jul 11, 2021 7:26 pm

First post

I was able to borrow a 6mm Radian from a very generous fellow amateur astronomer, and tested it as follows:

The night of July 2, 2021 was clear,...

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Thanks for the shoot out John. At the time I had a few Radians I did not have Delos or Delites to compare, but Radians stroke me as good performers...

3 Replies

1685 Views

Last post by John Fitzgerald
Mon Jul 12, 2021 9:35 pm
Morpheus Vs ES92s

Last post by 25585 « Tue Jul 06, 2021 9:32 pm
Replies: 6
by TayM57 » Fri Jul 02, 2021 3:18 pm

First post

How do these EP's stack up against each other? How are they similar to each other, and how are they dissimilar?

I know AFOV is how they are...

Last post

I find the 17 ES92 easier than 12, wearing glasses. The 12 needs to be pushed firmer against my glasses lens.

Comparing 12.5 & 17.5 Morpheus against...

6 Replies

1500 Views

Last post by 25585
Tue Jul 06, 2021 9:32 pm

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