Eyepieces

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Creating a basic set of eyepieces for your new telescope

Last post by Bigzmey « Thu Oct 20, 2022 8:57 pm
Replies: 67
by Lady Fraktor » Thu May 23, 2019 2:34 am
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First post

One of the most asked questions by beginners, What eyepieces should I get?

There is always a lot of discussion from people on what eyepieces to get...

Last post

I use combination of increase by factor (i.e. by 1.4x), exit pupil and U curve.

I star with 2mm exit pupil, where most of my galaxy hunting is done...
67 Replies

95189 Views

Last post by Bigzmey
Thu Oct 20, 2022 8:57 pm
The 1X / 2X / 3X Magnification Protocol for eyepiece set selection

Last post by 25585 « Sun Feb 27, 2022 12:25 pm
Replies: 26
by Don Pensack » Tue May 25, 2021 10:29 pm
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I wrote this a bit over 15 years ago. It still works today to yield a very basic set on which to build:

1X / 2X / 3X Magnification Protocol for...

Last post

With the exception of my ES92s & Baader Morpheus ranges, I normally stay below 65° for FL <20mm. To have a FoV where its all visible, as for...
26 Replies

19558 Views

Last post by 25585
Sun Feb 27, 2022 12:25 pm
Evolution of Eyepieces by Chris Lord

Last post by j.gardavsky « Sun Aug 15, 2021 3:39 pm
Replies: 19
by notFritzArgelander » Sun Oct 27, 2019 2:36 am

First post

I just brought this over from the old place. I suggest we make this sticky?

Last post

You might like this information, too:

The Erfles, and some other eyepieces are desribed by the Zeiss designers in

DIE FERNROHRE UND...

19 Replies

37915 Views

Last post by j.gardavsky
Sun Aug 15, 2021 3:39 pm
A Guide to choosing eyepieces

Last post by OleCuss « Fri Jul 02, 2021 4:58 pm
Replies: 13
by OleCuss » Sat Apr 27, 2019 4:40 am

First post

There is much controversy over eyepieces and their selection and this will persist for eternity. The reason for this is that each of us has a...

Last post

As long as it works for you, I'm happy!

13 Replies

31487 Views

Last post by OleCuss
Fri Jul 02, 2021 4:58 pm
Edmund RKE a classic or outdated?

Last post by Lady Fraktor « Thu Jan 26, 2023 7:08 pm
Replies: 16
by helicon » Tue Oct 11, 2022 3:04 pm

First post

I still have my circa 1979 Edmund Scientific RKE, a modified Kellner design which Edmund patented back in the 1970's. It came with my red tube 4.25...

Last post

They seem to have quite a lifespan!

I think I have had my set for about 12-15 years as well.

16 Replies

444 Views

Last post by Lady Fraktor
Thu Jan 26, 2023 7:08 pm
AstroTech UWA 82*

Last post by pakarinen « Tue Jan 10, 2023 2:01 pm
Replies: 3
by Frazman » Thu Dec 29, 2022 11:49 pm

First post

EA393D1C-5F3F-41A6-811F-B1402DBE9932.jpeg

A new scope deserves new glasses, yes, I’m sure I heard that SOMEWHERE?!

If I am wrong just let me be...

Last post

Huh. I just happen to have a new AT72ED and a couple of AT Paradigms. ;) Might be time to try a wider FOV AT.

I know what you mean about the vertigo...

3 Replies

131 Views

Last post by pakarinen
Tue Jan 10, 2023 2:01 pm
Svbony 3-8mm Zoom

Last post by pakarinen « Tue Jan 10, 2023 1:56 pm
Replies: 4
by WilliamPaolini » Sat Jan 07, 2023 8:41 pm

First post

IMG_2207 (web).jpg

Received a Svbony 3-8 Zoom yesterday and took it out for a daytime spin today as well as did some bench test measures. Been...

Last post

Skies were clear, cold (38 deg F / 3.3 C), and a little breezy tonight so gave the Svbony 3-8mm Zoom a try on Jupiter, Mars, Betelgeuse, and M42/43...

4 Replies

238 Views

Last post by pakarinen
Tue Jan 10, 2023 1:56 pm
SvBony SV137 2x Barlow

Last post by The Wave Catcher « Sat Dec 24, 2022 2:32 am
Replies: 1
by Shorty Barlow » Wed Sep 07, 2022 8:38 am

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I was pretty impressed with the SvBony 3x Barlow, considering its competitive retail price. This made me wonder about the 2x version of the same...

Last post

I just received my SvBONY SV137 3x Barlow today. It's too cold and cloudy to test it out yet but for the price I thought I'd get it to play with. If...

1 Replies

153 Views

Last post by The Wave Catcher
Sat Dec 24, 2022 2:32 am
Comparing my wide angle Eyepieces

Last post by Bigzmey « Fri Dec 23, 2022 9:28 pm
Replies: 4
by Piet Le Roux » Thu Dec 22, 2022 9:04 am

First post

I have made peace with the fact that I will not be able buy a 35mm Panoptic soon, I did try and fill the gap with a 34mm Svbony SWA but were...

Last post

One of the advantages of SCTs is that even simple EPs perform well with them.

Have you tried 34mm Svbony SWA it without the reducer?

Yes I have...

4 Replies

117 Views

Last post by Bigzmey
Fri Dec 23, 2022 9:28 pm
Build EP’s from 7x50 Binos

Last post by Frankskywatcher « Wed Dec 21, 2022 2:30 pm
Replies: 2
by Frankskywatcher » Wed Dec 21, 2022 3:15 am

First post

Found this to be very interesting and straight forward !

Last post

I was surprised at how straight forward his design is !

2 Replies

75 Views

Last post by Frankskywatcher
Wed Dec 21, 2022 2:30 pm
Williams Optics SWAN 33 for 80ED?

Last post by Bigzmey « Sat Dec 17, 2022 9:41 pm
Replies: 2
by Ylem » Sat Dec 17, 2022 7:37 pm

First post

Thoughts on this EP for use in my 80ED f7.5?

Would it give me messy stars at the edge?

Last post

You will find it very comfortable EP to use in your frac. True, the edge of the field will be a bit soft, but it applies to most of wide fields.

I...

2 Replies

130 Views

Last post by Bigzmey
Sat Dec 17, 2022 9:41 pm
EP Recommendation

Last post by dandva « Sat Dec 17, 2022 7:18 pm
Replies: 8
by dandva » Fri Dec 16, 2022 5:27 am

First post

I've been looking at the 5mm Agena Starguider Dual ED eyepiece ....right now i just have a 10mm & 25mm that came with the scope.....
I would like to...

Last post

Thank you for the comments and recommendations.......

Dan

8 Replies

159 Views

Last post by dandva
Sat Dec 17, 2022 7:18 pm
Eyepieces for binoviewing

Last post by Bigzmey « Sat Dec 10, 2022 10:45 pm
Replies: 3
by Nakedgun » Sat Dec 10, 2022 7:27 pm

First post

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Most of us are unable to sample every design out there in an attempt to find that one set which is optimal for our needs.

I have bought sets of...

Last post

Unfortunately I can't use many of fine EPs in BVs because they are too wide for my nose.

My favorite are Vixen SLVs but other slim EPs like Plossls...

3 Replies

127 Views

Last post by Bigzmey
Sat Dec 10, 2022 10:45 pm
Christmas Money $$$ EP Upgrade

Last post by Bigzmey « Mon Dec 05, 2022 9:52 pm
Replies: 13
by JayTee » Sun Nov 27, 2022 4:33 am

First post

If you were gifted a nice amount of Moola for the holidays and wanted to go a step up from your current EP inventory of Celestron XCel LX EPs. Would...

Last post

I would also suggest to go with Astronomik or Lumicon for visual.

13 Replies

260 Views

Last post by Bigzmey
Mon Dec 05, 2022 9:52 pm
1.25" to 2" Adapter

Last post by Nakedgun « Mon Nov 28, 2022 9:11 pm
Replies: 4
by LDW47 » Wed Nov 23, 2022 8:48 pm

First post

Does / has anyone used a 1.25 to 2 adapter in their telescope in order to utilize their 2 eps in their 1.25 scope ?

Last post

~
I have one, but have never used it.

.

4 Replies

136 Views

Last post by Nakedgun
Mon Nov 28, 2022 9:11 pm
Exceptional value

Last post by Don Pensack « Thu Nov 24, 2022 3:39 pm
Replies: 5
by Nakedgun » Thu Nov 17, 2022 3:50 am

First post

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Astronomics, which I believe is the largest retailer of astro gear in the U.S. has their proprietary line of Astro-Tech products for us. Recently,...

Last post

It appears to be identical to the APM Ultra Flat Field, which is also really a 10.5mm.
Both are the same weight, even.

Note that the eyepiece is...

5 Replies

196 Views

Last post by Don Pensack
Thu Nov 24, 2022 3:39 pm
Who likes 80°+ eyepieces?

Last post by Don Pensack « Sun Nov 13, 2022 3:26 pm
Replies: 23
by Lady Fraktor » Thu Nov 10, 2022 10:34 pm
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Buy these and let me know how they work.
Then I can decide if they will be in the 2024 astro budget. :D

Last post

I intend to test the 85° Pentax XWs as soon as they are available.
Other than the normal 19 factors I look for to evaluate an eyepiece, I will...
23 Replies

432 Views

Last post by Don Pensack
Sun Nov 13, 2022 3:26 pm
15mm Altair Astro ULTRAFLAT

Last post by Bigzmey « Wed Nov 09, 2022 4:41 pm
Replies: 6
by Shorty Barlow » Mon Sep 12, 2022 6:45 pm

First post

I originally acquired the 15mm Altair ULTRAFLAT in April 2019 for my 80ED DS Pro Evostar. It was a month later that I managed to get first light with...

Last post

Thanks for the review. I was thinking of trying an Altair for my fracs, but wasn't sure I wanted to gamble on one. I'll have to take another look...

6 Replies

282 Views

Last post by Bigzmey
Wed Nov 09, 2022 4:41 pm
How to calculate EP's apparent (angular) FOV and true FOV from EP's field stop

Last post by Don Pensack « Fri Oct 21, 2022 2:28 pm
Replies: 27
by Bigzmey » Wed Sep 21, 2022 8:28 pm
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First post

EP's apparent (angular) FOV = 57.3 x ( EP field stop /EP FL)

True FOV for EP/scope = 57.3 x (EP field stop/telescope FL)

If you don't know EP field...

Last post

A little point about the exit pupil and the image in the telescope:
Eyepieces are afocal. The image is in focus at all distances from the eyepiece,...
27 Replies

629 Views

Last post by Don Pensack
Fri Oct 21, 2022 2:28 pm
Correcting error

Last post by John Donne « Sun Oct 16, 2022 7:15 am
Replies: 5
by Nakedgun » Sun Oct 16, 2022 2:24 am

First post

Just about everyone has one of these; I, too, had one before foolishly selling it some time ago.
Now, reacquired:

IMGP0309.JPG

.

Last post

Congratulations. 👍

My TV 22 Panoptic, discontinued now, is one of a trio of EP I am always sure to have in my travel case.

5 Replies

164 Views

Last post by John Donne
Sun Oct 16, 2022 7:15 am
Tele Vue 9mm Nagler T6

Last post by Razz « Tue Oct 04, 2022 11:46 pm
Replies: 27
by Razz » Sat Oct 01, 2022 8:07 pm
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I just purchased an Apertura AD10, should have it next week, and I've read many reviews. The one thing that seems to be a constant is to replace the...

Last post

Well, they are going to be my jumping off point. I still plan on upgrading them eventually and, at this point, I'll be trying the Morpheus eyepieces...
27 Replies

587 Views

Last post by Razz
Tue Oct 04, 2022 11:46 pm
New Brandon eyepiece from Vernonscope

Last post by Lady Fraktor « Mon Sep 26, 2022 6:13 pm

by Lady Fraktor » Mon Sep 26, 2022 6:13 pm

I should hopefully have mine in a few weeks :)

0 Replies

159 Views

Last post by Lady Fraktor
Mon Sep 26, 2022 6:13 pm
BST 5mm UWA EP

Last post by The Wave Catcher « Wed Sep 21, 2022 2:46 am
Replies: 8
by JayTee » Fri Sep 16, 2022 4:42 am

First post

I have decided that I am deficient in the sub-10mm range in my arsenal. I'm looking at the BST UWA 5mm EP for my Celestron CR-150. Will this be...

Last post

I don’t have any advice for you but I can say that I love my Astro-Tech 5 mm Paradigm Dual ED. It has 60 degrees of field of view and very good eye...

8 Replies

341 Views

Last post by The Wave Catcher
Wed Sep 21, 2022 2:46 am
Starbase 'Orthoscopic Plossls'

Last post by Shorty Barlow « Wed Sep 14, 2022 12:53 pm
Replies: 55
by Shorty Barlow » Tue Sep 06, 2022 12:40 am
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First post

The Starbase four element ‘orthoscopic’ series of eyepieces are distributed by Takahashi Seisakusho Ltd. There are supposedly five in the range...

Last post

Well, the plans I had for an early morning session on M42 with the three newly-barrelled Kubota Starbase EP's got scuppered by my own body.
55 Replies

1503 Views

Last post by Shorty Barlow
Wed Sep 14, 2022 12:53 pm
5mm 'Mavis Laven' Eyepiece

Last post by Shorty Barlow « Mon Sep 12, 2022 12:08 am

by Shorty Barlow » Mon Sep 12, 2022 12:08 am

This 5mm 'Mavis Laven' eyepiece had cost me the princely sum of £13.85 (16.02 USD/15.95 euro) from Amazon. Normally these retail at twice or even...

0 Replies

145 Views

Last post by Shorty Barlow
Mon Sep 12, 2022 12:08 am

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