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

96653 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

20081 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

38447 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

31853 Views

Last post by OleCuss
Fri Jul 02, 2021 4:58 pm
Eyepiece for EdgeHD11

Last post by OzEclipse « Thu May 25, 2023 11:41 pm
Replies: 7
by ic_1101 » Wed Apr 05, 2023 3:20 pm

First post

Hi all! Being mainly an AP imager I have only a few eyepieces for visual use (20&30mm). Lately my grandkids have shown an interest in viewing the...

Last post

Lot's of good recommendations already posted.

My 18 f5.5 has a 2500mm focal length, not that different to the Edge 11.

For planet observing all...

7 Replies

229 Views

Last post by OzEclipse
Thu May 25, 2023 11:41 pm
At It Again

Last post by Don Pensack « Tue May 23, 2023 4:06 pm
Replies: 6
by LDW47 » Fri Apr 14, 2023 2:06 pm

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Even though I have almost a complete set of Morpheus eyepieces which was preceded by the Hyperions which were preceded by a set of ........, which...

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I briefly had APM 18mm version and it was a very comfortable EP. I wish smaler FLs had better eye relief though.

I think the 10mm has a 16mm er,...

6 Replies

250 Views

Last post by Don Pensack
Tue May 23, 2023 4:06 pm
Nice sale on Explore Scientific EPs

Last post by Bigzmey « Sat May 20, 2023 1:36 am
Replies: 9
by Ylem » Thu Apr 06, 2023 10:37 pm

First post

I received an email from Agena with some good sales, especially on ES EPs, especially the 68°s

Last post

Congrats! This is a nice set of glass. I see a room for a couple more. :D

~

Haven't yet figured out just what will occupy those spaces.

....

9 Replies

265 Views

Last post by Bigzmey
Sat May 20, 2023 1:36 am
Astrotech PF EPs?

Last post by Bigzmey « Fri Mar 17, 2023 6:31 pm
Replies: 1
by pakarinen » Fri Mar 17, 2023 2:09 pm

First post

Anybody have eyes-on experience with Astrotech PF EPs? I thought I might try one as a spare just for grins since they're only $60 or so.

Last post

Just looking at the form factor and specs I don't believe they are well corrected for fast scopes like yours. Expect to see some field distortions.

1 Replies

152 Views

Last post by Bigzmey
Fri Mar 17, 2023 6:31 pm
Classic find

Last post by Unitron48 « Fri Mar 17, 2023 4:46 pm
Replies: 9
by Bigzmey » Sun Feb 26, 2023 6:26 pm

First post

I have been looking for this classic EP for awhile. Finally, last week a gentleman from San Diego responded to my wanted ad. Behold Meade second...

Last post

Very nice! Can't wait to hear your report!!

Dave

9 Replies

323 Views

Last post by Unitron48
Fri Mar 17, 2023 4:46 pm
Celestron 24mm Ultima Edge

Last post by LDW47 « Sat Feb 25, 2023 10:08 pm
Replies: 27
by LDW47 » Sat Feb 18, 2023 1:55 pm
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I am looking at replacing my Baader 21mm Hyperion with the Celestron 24mm Ultima Edge. Good plan or poor plan ? Is it worth it or not worth it ? My 5...

Last post

As usual and as with other astro sites this has mushroomed in to a lot more than my simple question about my acquiring that ep. The post / issue was...
27 Replies

696 Views

Last post by LDW47
Sat Feb 25, 2023 10:08 pm
My Newest

Last post by Don Pensack « Sat Feb 25, 2023 3:43 pm
Replies: 13
by LDW47 » Tue Jun 15, 2021 1:55 pm

First post

A new competitor to my other widefields. 2 , 31.5mm, 90° FOV . Tonite skies are to be average / above average, it will get a good testing against my...

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I might mention that Ramsden and Huygens eyepieces were designed in the era when f/15 would have been considered a fast f/ratio.
When Kellners,...

13 Replies

1253 Views

Last post by Don Pensack
Sat Feb 25, 2023 3:43 pm
Vixen 4mm SLV on the way

Last post by Bigzmey « Fri Feb 24, 2023 6:10 pm
Replies: 3
by pakarinen » Fri Feb 24, 2023 12:23 pm

First post

Showed as OOS at US vendors so I ordered through Vixen Japan / AMZ. I guess this means it's made it to the US. :lol:

4mm.jpg

Last post

Congrats! Those are among my favorites. SLV 4mm getting used a lot in my 102ED and 80ED scopes.

3 Replies

163 Views

Last post by Bigzmey
Fri Feb 24, 2023 6:10 pm
1.25" to 2" Adapter

Last post by CygnusX-1 « Fri Feb 24, 2023 1:50 pm
Replies: 5
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

Had to screen cap my post as it wouldn't go in and was marked as spam???

5 Replies

350 Views

Last post by CygnusX-1
Fri Feb 24, 2023 1:50 pm
Svbony 7-21

Last post by LDW47 « Mon Feb 20, 2023 4:42 pm
Replies: 8
by Frazman » Wed Feb 01, 2023 12:33 pm

First post

A bit of our viewing here is accomplished by trekking in on foot to remote spots. With that in mind, we try to keep things light (hence the recent...

Last post

A bit of our viewing here is accomplished by trekking in on foot to remote spots. With that in mind, we try to keep things light (hence the recent...

8 Replies

296 Views

Last post by LDW47
Mon Feb 20, 2023 4:42 pm
Explore Scientific EPs sale

Last post by helicon « Wed Feb 15, 2023 2:25 pm
Replies: 1
by Bigzmey » Mon Feb 13, 2023 9:10 pm

First post

Some good savings on many ES EPs.

Last post

Good to hear.

1 Replies

166 Views

Last post by helicon
Wed Feb 15, 2023 2:25 pm
2023 Eyepiece Buyer's Guide

Last post by Bigzmey « Sat Feb 11, 2023 9:47 pm
Replies: 9
by Don Pensack » Sun Feb 05, 2023 3:45 pm

First post

I just completed the 2023 Eyepieces Buyer's Guide

It is posted here:

It is free to download.

Almost 1700 entries this year, the largest number...

Last post

Thanks for putting (a lot of) effort in Don, this is a great reference.

9 Replies

308 Views

Last post by Bigzmey
Sat Feb 11, 2023 9:47 pm
Thanking Don For My Birthday Presents

Last post by helicon « Sat Feb 11, 2023 7:12 pm
Replies: 5
by JayTee » Sat Feb 11, 2023 1:12 am

First post

Each one of my 4 sons used proffered monies to get wonderful birthday presents for me!

I would also like to thank Don's Don Pensack store for...

Last post

Excellent JT!

5 Replies

226 Views

Last post by helicon
Sat Feb 11, 2023 7:12 pm
Stellarvue EUW 82 Deg. On Sale

Last post by The Wave Catcher « Sat Feb 11, 2023 1:10 am
Replies: 1
by Don Pensack » Sat Feb 11, 2023 12:06 am

First post

Huh?
They're $149 each on the Stellarvue website and $129 each on my website.
Where are they $50?
You save $50 over the $179.00 list price.
Maybe...

Last post

Hi Don,

Thanks for correcting me, I must of had a brain fart. You are correct, I misread it. Maybe the administrators can delete this thread for...

1 Replies

161 Views

Last post by The Wave Catcher
Sat Feb 11, 2023 1:10 am
Edmund RKE a classic or outdated?

Last post by Don Pensack « Wed Feb 01, 2023 4:18 pm
Replies: 21
by helicon » Tue Oct 11, 2022 3:04 pm
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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

The Nagler 3-6 zoom has an eye lens that is only about 1/3 as large as the top of the eyepiece.
But by the time you get to the exit pupil of the...
21 Replies

1117 Views

Last post by Don Pensack
Wed Feb 01, 2023 4:18 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

325 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

504 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

First post

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

284 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

288 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

206 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

367 Views

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

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