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Eyepieces
Discuss telescope eyepieces.
Topics: 293

293 Topics

3479 Posts

Last post Re: Evolution of Eyepieces .
by Lady Fraktor View the latest post
Mon May 06, 2024 5:15 pm
Binoculars
Discuss binoculars.
Topics: 139

139 Topics

1462 Posts

Last post Re: My binoculars finally arr…
by pakarinen View the latest post
Tue May 14, 2024 12:54 pm
General Optics
Discussion of optical systems and their characteristics.
Topics: 36

36 Topics

389 Posts

Last post Re: How a lens creates an ima…
by John Baars View the latest post
Tue May 14, 2024 9:09 am

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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...

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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

25451 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

35875 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

109075 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

41925 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

23535 Views

Last post by Don Pensack
Sun Jul 11, 2021 2:35 pm
My binoculars finally arrived

Last post by pakarinen « Tue May 14, 2024 12:54 pm
Replies: 7
by Lady Fraktor » Wed May 08, 2024 3:25 am

First post

A thank you to John for his recent review of his new Vortex Optics Diamondback 8x32 binoculars.
After a few Pms I ordered a set and they arrived a...

Last post

Mine are lower on the foodchain, but I really like my Vortex Crossfire 8x42s. Enjoy!

7 Replies

228 Views

Last post by pakarinen
Tue May 14, 2024 12:54 pm
How a lens creates an image

Last post by John Baars « Tue May 14, 2024 9:09 am
Replies: 3
by Nakedgun » Sun Nov 26, 2023 6:41 pm

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And, why aperture matters.

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Last post

Quite revealing!

3 Replies

753 Views

Last post by John Baars
Tue May 14, 2024 9:09 am
Evolution of Eyepieces .

Last post by Lady Fraktor « Mon May 06, 2024 5:15 pm
Replies: 23
by messier 111 » Thu Apr 25, 2024 1:31 am
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First post

this is what the future eyepiece will look like ,

We cannot stop progress, but progress can stop us.

Last post

Oz I think you left about 2 dozen no off of that response.
23 Replies

1265 Views

Last post by Lady Fraktor
Mon May 06, 2024 5:15 pm
ES 52° eyepiece series

Last post by Don Pensack « Sat May 04, 2024 3:55 pm
Replies: 7
by Nakedgun » Thu May 02, 2024 12:57 am

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Does anyone have experience with this line?

Thank you.

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Last post

This same question has been asked on CloudyNights.com and StargazersLounge.com recently.
There are a lot of reviews on-line, in threads with a lot of...

7 Replies

254 Views

Last post by Don Pensack
Sat May 04, 2024 3:55 pm
Eyerelief problem solved with eyecup-flattening on Vortex Diamond

Last post by helicon « Wed Apr 24, 2024 5:31 pm
Replies: 5
by John Baars » Tue Apr 23, 2024 8:09 am

First post

For biking trips here in the country, I like to have a small pair of binoculars around my neck. For enjoying the view every now and then and if...

Last post

Interesting modification and a creative solution to the problem John. Nicely done.

5 Replies

738 Views

Last post by helicon
Wed Apr 24, 2024 5:31 pm
Astro-Tech EPs

Last post by Mike Q « Tue Apr 23, 2024 12:49 am
Replies: 14
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

The eye relief on the 7mm/100 is definitely tight. You have to get your eye right in there to see the whole FOV. Fortunately I am used to short eye...

14 Replies

2140 Views

Last post by Mike Q
Tue Apr 23, 2024 12:49 am
10 inch SCT eyepieces

Last post by Mike Q « Mon Apr 22, 2024 12:38 am
Replies: 3
by Mike Q » Sun Apr 21, 2024 5:06 pm

First post

So later in May i am being given a Meade 10 inch LX200 F10 SCT. It is an older scope that has had all the electronic replaced. It comes with a 2 inch...

Last post

Well we are going to see how well they do when i get it home. Hopefully buy sometime in June i will have a cart made for it so i can easily transport...

3 Replies

405 Views

Last post by Mike Q
Mon Apr 22, 2024 12:38 am
2024 Eyepieces Buyer's Guide

Last post by Don Pensack « Sat Apr 20, 2024 9:27 pm
Replies: 4
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

Wow Don, that is a tremendous reference guide. Thank you for all the work that went into this.

Can I assume that if I see two vendors eye pieces...

4 Replies

689 Views

Last post by Don Pensack
Sat Apr 20, 2024 9:27 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

813 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

1465 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

773 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

1796 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

1211 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

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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

2166 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:

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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

830 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

730 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

1265 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

9623 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

817 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

3277 Views

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

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