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Eyepieces
Discuss telescope eyepieces.
Topics: 290

290 Topics

3436 Posts

Last post Re: 2024 Eyepieces Buyer's Gu…
by Lady Fraktor View the latest post
Thu Apr 18, 2024 3:36 am
Binoculars
Discuss binoculars.
Topics: 137

137 Topics

1448 Posts

Last post Re: Oberwerk 8x56 LWs?
by pakarinen View the latest post
Mon Mar 18, 2024 11:39 am
General Optics
Discussion of optical systems and their characteristics.
Topics: 36

36 Topics

388 Posts

Last post Re: What has happened with th…
by Mike Q View the latest post
Fri Dec 29, 2023 10:14 pm

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Replies

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Last post

The 1X / 2X / 3X Magnification Protocol for eyepiece set selection

Last post by Don Pensack « Fri Dec 29, 2023 3:50 pm
Replies: 29
by Don Pensack » Tue May 25, 2021 10:29 pm
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First post

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

I like the magnifications a bit closer together with my 102mm as the magnifications pass 100x. I like 120x/150x/180x/210x as a goal so I can fight...
29 Replies

23927 Views

Last post by Don Pensack
Fri Dec 29, 2023 3:50 pm
A Guide to choosing eyepieces

Last post by Don Pensack « Fri Dec 29, 2023 3:40 pm
Replies: 19
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

An excellent common sense article. Math is not my strong point, but even I could follow your analysis. It is very easy to go down rabbit holes after...

19 Replies

34722 Views

Last post by Don Pensack
Fri Dec 29, 2023 3:40 pm
Creating a basic set of eyepieces for your new telescope

Last post by Lady Fraktor « Thu Dec 07, 2023 1:06 pm
Replies: 69
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

Your 11 mm eyepiece will give exit pupil of 1.28 mm, TFOV of 0.625° and a power of 20x per inch of aperture.
Well within the limits of the...
69 Replies

105396 Views

Last post by Lady Fraktor
Thu Dec 07, 2023 1:06 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

40897 Views

Last post by j.gardavsky
Sun Aug 15, 2021 3:39 pm
Optics Websites

Last post by Don Pensack « Sun Jul 11, 2021 2:35 pm
Replies: 18
by mikemarotta » Fri Jul 02, 2021 6:00 pm

First post

I found this one:

Amateur Telescope Optics by Vladimir Sasek.

it seems all right and several or many others must be out there.
Any other leads?...

Last post

Enjoy Mr. Suiter book when you get to read it. :)

Star Testing Astronomical Telescopes: A Manual for Evaluation and Adjustment by Harold Richard...

18 Replies

22368 Views

Last post by Don Pensack
Sun Jul 11, 2021 2:35 pm
2024 Eyepieces Buyer's Guide

Last post by Lady Fraktor « Thu Apr 18, 2024 3:36 am
Replies: 1
by Don Pensack » Wed Apr 17, 2024 11:05 pm

First post

I have just posted the 2024 Eyepieces Buyer's Guide here:

Last post

As always, the work you put in to this every year is amazing Don!
Thank you.

1 Replies

40 Views

Last post by Lady Fraktor
Thu Apr 18, 2024 3:36 am
Astro-Tech EPs

Last post by Don Pensack « Wed Apr 17, 2024 2:16 pm
Replies: 10
by JayTee » Sat Jun 24, 2023 6:58 pm

First post

Has anyone tried any of the UWA EPs from Astro-Tech? I just stumbled across them today and became curious about their performance.

They can be found...

Last post

I went ahead and bit the bullet and bought the AT 7mm 100 last week. It arrived on eclipse day, needless to say i did not open the box until after...

10 Replies

1298 Views

Last post by Don Pensack
Wed Apr 17, 2024 2:16 pm
Delite selection

Last post by DeanD « Wed Apr 17, 2024 12:44 pm
Replies: 11
by Caldwell 14 » Thu Apr 11, 2024 4:10 pm

First post

Hello folks

I own a Tele Vue 102 refractor and and have a small selection of eyepieces and try to keep it that way. My scope is 8.6fl and I...

Last post

I agree with Gabby. I have the Tele-pod and use it with the TV76. I also have a Tak TSA 102 which I often put on a Stellarvue M2 or a home-made...

11 Replies

284 Views

Last post by DeanD
Wed Apr 17, 2024 12:44 pm
ES 9mm 100 degree

Last post by Mike Q « Thu Apr 11, 2024 11:47 pm
Replies: 15
by Mike Q » Mon Feb 05, 2024 9:23 pm

First post

Well i have taken the plunge into 100 degree eyepieces. Saturday night i dropped my new ES 9mm 100 degree into the focuser of the 16 inch with a GSO...

Last post

I made the decision to go ahead and buy the AT 7mm 100 degree eyepiece last week. It will get use in the 102 and the 10 inch more then the 16 inch...

15 Replies

723 Views

Last post by Mike Q
Thu Apr 11, 2024 11:47 pm
New Baader Zoom

Last post by Caldwell 14 « Thu Apr 11, 2024 5:03 pm
Replies: 4
by JayTee » Wed Feb 14, 2024 10:09 pm

First post

My Baader Hyperion Zoom Mark IV EP from Birthday money just showed up in today's post and it may actually be clear tonight. YAY.

Baader Zoom.jpg

Last post

Yeah they are a great zoom. I used one for years. Very comfortable, nice views and very convenient.

4 Replies

188 Views

Last post by Caldwell 14
Thu Apr 11, 2024 5:03 pm
I'm looking to buy a zoom .

Last post by messier 111 « Wed Mar 27, 2024 10:01 pm
Replies: 20
by messier 111 » Mon Mar 18, 2024 12:00 am
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First post

hi all ,
I'm looking to buy a zoom lens for my new friend Lunt 80mm Solar MT.
several people tell me about the zoom, Baader Hyperion Universal Zoom...

Last post

Zooms can be sharp, but they have very narrow fields of view in general.
The Leica Aspherical and the APM Super Zoom are two exceptions.
The Svbony...
20 Replies

529 Views

Last post by messier 111
Wed Mar 27, 2024 10:01 pm
Oberwerk 8x56 LWs?

Last post by pakarinen « Mon Mar 18, 2024 11:39 am
Replies: 6
by pakarinen » Wed Mar 06, 2024 4:20 pm

First post

I have some astro cash in my pocket again, so I'm doing my usual kid in a candy shop routine - Ooooh! I could get that or I could that or I could get...

Last post

8x40 are very comfortable free hand.

I've had them out twice so far. The roof design seems more ergonomic than Porros to me, but that might just...

6 Replies

363 Views

Last post by pakarinen
Mon Mar 18, 2024 11:39 am
Binoculars used for anything

Last post by Nakedgun « Mon Feb 26, 2024 4:40 pm
Replies: 15
by Nakedgun » Wed Apr 19, 2023 7:57 pm

First post

~

We have a category for most used astro binos, so what about any others you have and use for general observing, or even astronomy, though they may...

Last post

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This just added to my collection, the smallest prismatic binocular I'm likely to find, at 6x15.

Have you anything smaller?

:

IMGP1408.JPG...

15 Replies

1349 Views

Last post by Nakedgun
Mon Feb 26, 2024 4:40 pm
Innovative binocular stabilization

Last post by Mike Q « Tue Feb 20, 2024 12:00 am
Replies: 4
by Nakedgun » Sun Feb 18, 2024 4:44 pm

First post

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Revealed here:

.

Last post

~

Revealed here:

Just wanted to say i like your signature line at the bottom

.

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Seems more relevant now than ever.

Absolutely
.

4 Replies

247 Views

Last post by Mike Q
Tue Feb 20, 2024 12:00 am
Eyepiece Ident

Last post by KLA58 « Wed Feb 14, 2024 1:36 pm
Replies: 2
by KLA58 » Tue Feb 13, 2024 6:08 pm

First post

Skysafari 6+ has a section to load your specific equipment. While loading mine I discovered that my eyepieces are not listed. Does anyone know why...

Last post

Thanks Lady Fraktor. Appreciate all the help I can get.

A Plossl eyepiece is pretty standard.
4 elements in 2 groups with a 50-52° AFOV. If it...

2 Replies

176 Views

Last post by KLA58
Wed Feb 14, 2024 1:36 pm
result of the Televue survey.

Last post by DeanD « Thu Feb 01, 2024 11:18 am
Replies: 6
by messier 111 » Thu Jan 25, 2024 11:43 pm

First post

result of the Televue survey.

Last post

I don't think they plan to rest on their laurels.
I suspect the purpose of the poll was to get opinions about what customers found valuable so they...

6 Replies

600 Views

Last post by DeanD
Thu Feb 01, 2024 11:18 am
Suggestions for Parallelogram Binocular Mounts

Last post by atl613 « Tue Jan 30, 2024 10:53 pm
Replies: 14
by Bigzmey » Sun Aug 01, 2021 11:42 pm

First post

With acquisition of 20x80 binos it is time for me to venture into this new to me area. Based on your personal experience what parallelogram mount...

Last post

Groovy.

14 Replies

8726 Views

Last post by atl613
Tue Jan 30, 2024 10:53 pm
Swarovski AX Visio.

Last post by StarHugger « Tue Jan 30, 2024 7:43 pm
Replies: 2
by KingClinton » Tue Jan 30, 2024 4:56 pm

First post

These have more to do with birding than astronomy.
But I wonder if this type of technology could one day be applied to astronomy and our night...

Last post

That's an impressive pair of binoculars Clinton.

I wonder when they will put a compass and an altimeter and a star database in them?

Graeme

And...

2 Replies

266 Views

Last post by StarHugger
Tue Jan 30, 2024 7:43 pm
ORION ED 20x80

Last post by pakarinen « Tue Jan 30, 2024 3:21 pm
Replies: 14
by jawaid1968 » Mon Oct 24, 2022 2:42 am

First post

Hello everyone.
Let's talk about ORION ED 20x80
Advantages and Disadvantages or compare with other brands without being bias.

Last post

Had two pair of defective Celestron 15x70s. Bought Orion Giant View IF 15x70s which are very nice, but way too heavy IMO to be used effectively...

14 Replies

2478 Views

Last post by pakarinen
Tue Jan 30, 2024 3:21 pm
TV eyepiece survey

Last post by Don Pensack « Sun Jan 14, 2024 3:13 pm
Replies: 10
by Nakedgun » Sun Jan 07, 2024 6:01 am

First post

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Today, I took the nine-question email survey.

All I want them to change is to lose the accursed undercuts.

We'll see.

.

Last post

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Today, I took the nine-question email survey.

All I want them to change is to lose the accursed undercuts.

We'll see.
.

I would be shocked if...

10 Replies

560 Views

Last post by Don Pensack
Sun Jan 14, 2024 3:13 pm
What has happened with the Explore Scientific love?

Last post by Mike Q « Fri Dec 29, 2023 10:14 pm
Replies: 41
by Lady Fraktor » Sun Oct 16, 2022 5:57 pm
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3-4 years ago you could not go a day without reading postings about how great Explore Scientific telescopes are.
Now you hardly see them mentioned,...

Last post

I was wondering about a couple of their eyepieces. Seems like they have a 4.5 and a 6.7 82 degree eyepieces. Anyone have experience with them in a...
41 Replies

4711 Views

Last post by Mike Q
Fri Dec 29, 2023 10:14 pm
Orion LHD long eye relief 80°

Last post by Don Pensack « Fri Dec 29, 2023 3:33 pm
Replies: 6
by 25585 » Fri Jun 18, 2021 6:20 pm

First post

Under their own brand name, Orion sells a range of (advertised) 20mm eye relief 80° AFOV eyepieces.
They are 4.5mm, 6mm, 9mm all 1.25 fit, and two 2...

Last post

The modifications I made did not cure the EOFB, so I passed the eyepiece on to someone else.

6 Replies

1760 Views

Last post by Don Pensack
Fri Dec 29, 2023 3:33 pm
Mono - 8x36 or 10x36 or ???

Last post by OzEclipse « Wed Dec 27, 2023 10:58 am
Replies: 4
by pakarinen » Fri Dec 22, 2023 3:28 pm

First post

Looking at Vortex monoculars. What thinks the collective mind - 8x36 or 10x36? The price difference is small. Maybe Opticron 8x42?

I'd probably use...

Last post

Hi Olen,

Depends on your budget and how picky you are. The Bushnell Forge 42mm are truly superb for both day and nighttime use. Razor sharp and...

4 Replies

800 Views

Last post by OzEclipse
Wed Dec 27, 2023 10:58 am
Nice sale on Explore Scientific EPs

Last post by Mike Q « Sat Dec 23, 2023 1:10 pm
Replies: 11
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

ES has a sale going on right now. I snagged both the 4.5/82 and 11/82, basically it was buy one get one free

11 Replies

1883 Views

Last post by Mike Q
Sat Dec 23, 2023 1:10 pm
16x50 vs 10x50 shootout

Last post by Bigzmey « Wed Dec 13, 2023 7:59 pm
Replies: 21
by Bigzmey » Tue Mar 31, 2020 12:02 am
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First post

3/27/20

Most of smaller binoculars used for astronomy deliver large exit pupil (5-7mm). In telescopes however such large exit pupils result in...

Last post

With binos like with telescopes and EPs there is no one size fits all. I have started with mainstream 10x50, but than realized that 16x50 give me...
21 Replies

7145 Views

Last post by Bigzmey
Wed Dec 13, 2023 7:59 pm

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