Optics

Forum

Topics

Posts

Last post

Eyepieces
Discuss telescope eyepieces.
Topics: 223

223 Topics

2807 Posts

Last post Re: Antares Ultima
by Lady Fraktor View the latest post
Sun Jun 26, 2022 3:27 am
Binoculars
Discuss binoculars.
Topics: 126

126 Topics

1314 Posts

Last post Swarovski EL 8.5x42 and Zeiss…
by DeanD View the latest post
Mon May 30, 2022 4:05 am
General Optics
Discussion of optical systems and their characteristics.
Topics: 23

23 Topics

221 Posts

Last post Re: Prism versus diagonal in …
by Lady Fraktor View the latest post
Wed May 25, 2022 4:23 am

Active topics

Replies

Views

Last post

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
1

2
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

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

16592 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

33809 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

13879 Views

Last post by Don Pensack
Sun Jul 11, 2021 2:35 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

28933 Views

Last post by OleCuss
Fri Jul 02, 2021 4:58 pm
Creating a basic set of eyepieces for your new telescope

Last post by tomthetank « Fri Oct 09, 2020 2:51 am
Replies: 65
by Lady Fraktor » Thu May 23, 2019 2:34 am
1

2

3

4
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

thank you
65 Replies

82966 Views

Last post by tomthetank
Fri Oct 09, 2020 2:51 am
Antares Ultima

Last post by Lady Fraktor « Sun Jun 26, 2022 3:27 am
Replies: 5
by Lady Fraktor » Sat Jun 25, 2022 5:04 am

First post

Grab one (or two for binoviewing) while you can, only three left!
Who knows what storage room they were found in but there is a chance to purchase...

Last post

The Orion is a nice eyepiece.
To my eye I found the Antares had a tiny bit less scatter but very close.
If I remember correctly the only major...

5 Replies

95 Views

Last post by Lady Fraktor
Sun Jun 26, 2022 3:27 am
Docter/Noblex 12.5mm 84° ..... are back soon.

Last post by Piero « Sat Jun 11, 2022 11:31 pm
Replies: 15
by 25585 » Wed Nov 03, 2021 10:12 am

First post

About a year ago, Noblex, formerly Docter, eyepieces stopped being produced. However, APM are selling them again, the real deal Docter. I have bought...

Last post

I have used the docter for several years and it is one of the very best eyepieces I have tried.
I found that the level of contrast it delivers is on...

15 Replies

8924 Views

Last post by Piero
Sat Jun 11, 2022 11:31 pm
Looking For an Eyepiece

Last post by LDW47 « Sat Jun 11, 2022 12:42 pm
Replies: 9
by LDW47 » Fri Jun 10, 2022 3:24 am

First post

What are the recommendations, from actual experience prefered, of a good eyepiece in the 42-50mm range preferably as wide a FOV as possible in a 2...

Last post

The 50 mm is under 1 lb and the 42 mm is just over 1 lb.
A issue with low power 2 eyepieces unfortunately.
They are all heavy.

I was mentioning...

9 Replies

182 Views

Last post by LDW47
Sat Jun 11, 2022 12:42 pm
Eyepiece pricing

Last post by kt4hx « Wed Jun 08, 2022 1:26 pm
Replies: 4
by Lady Fraktor » Tue Jun 07, 2022 6:28 pm

First post

I understand that pricing of collector level eyepieces can be quite arbitrary at times but to price one at 2x the current high end price?
I have seen...

Last post

True Gabrielle. AM and CN are both good indicators of normal fair market value as a rule - usually. However, valuation of used equipment can be a bit...

4 Replies

132 Views

Last post by kt4hx
Wed Jun 08, 2022 1:26 pm
A Comparison

Last post by LDW47 « Mon Jun 06, 2022 1:36 am
Replies: 12
by LDW47 » Sat Jun 04, 2022 8:34 pm

First post

I have 3 Svbony zoom eps of varying sizes that perform brilliantly in my NP101 and 90mm, f5.5 scopes, none cost more than about $100 C. I have read...

Last post

Funny that you mentioned it. I had great expectations for Morpheus line and at one point got Morpheus 12.5mm to try. I could not stand it. Eye...

12 Replies

225 Views

Last post by LDW47
Mon Jun 06, 2022 1:36 am
That's not an EP, this is an EP!

Last post by Bigzmey « Sat Jun 04, 2022 5:02 pm
Replies: 24
by Bigzmey » Tue May 24, 2022 1:13 am
1

2
First post

Generally, I don't like heavy EPs. However, since I have installed showcase in my home office to store and display my scopes I wanted to add a...

Last post

Hi Bigz! Good luck with your eyepiece display! I have the Meade 30 and 24 UWA but unfortunately the 30 fogged up inside a few years ago and now makes...
24 Replies

539 Views

Last post by Bigzmey
Sat Jun 04, 2022 5:02 pm
Swarovski EL 8.5x42 and Zeiss Victory SF 8x42 impressions

Last post by DeanD « Mon May 30, 2022 4:05 am

by DeanD » Mon May 30, 2022 4:05 am

Hi all, I had the opportunity on the weekend to play with both the above binos, and while I didn't spend a huge amount of time with the intent of...

0 Replies

83 Views

Last post by DeanD
Mon May 30, 2022 4:05 am
Prism versus diagonal in an old f/9 ED Vixen

Last post by Lady Fraktor « Wed May 25, 2022 4:23 am
Replies: 10
by John Baars » Sun May 22, 2022 11:42 am

First post

My old f/9 ED Vixen refractor was build in Japan in the nineties of the twentieth century. She is more than 25 years old.

IMG_1154 - kopie final...

Last post

The objective from factory was stopped down to 95 mm due to the design of the lens cell and the tube was very thin walled aluminium tubing.
So thin...

10 Replies

252 Views

Last post by Lady Fraktor
Wed May 25, 2022 4:23 am
Oh Meade, say it aint so....

Last post by Richard « Mon May 16, 2022 4:09 pm
Replies: 36
by Don Alvarez » Wed Oct 23, 2019 8:37 pm
1

2
First post

The replacement line for the HD-60 is coming soon:

I don't know how I should feel about this.

Last post

Honestly I dont think plastic eyepieces will ever take over glass , its just a phase to make more money , electronic is the way for new kids , sad...
36 Replies

6055 Views

Last post by Richard
Mon May 16, 2022 4:09 pm
Levenhuk Ra Eypieces

Last post by CygnusX-1 « Mon May 16, 2022 12:22 pm
Replies: 4
by Refractordude » Mon Dec 28, 2020 9:59 pm

First post

I have a pair of Levenhuk binoculars that are great. Did not know they made eyepieces. The Ra series all have a 68 degree apparent angle of view, 8...

Last post

I used to own the 14.5mm. Used it in a 10 F/4.7 without a CC and it was excellent.

4 Replies

1036 Views

Last post by CygnusX-1
Mon May 16, 2022 12:22 pm
Issue with BCO 6mm

Last post by Lady Fraktor « Fri Apr 29, 2022 6:19 pm
Replies: 12
by West83 » Mon Apr 18, 2022 10:20 am

First post

Hi gang,

So I took the opportunity last night with semi clear skie for some lunar observations. I actually used my 6mm BCO for the first time in a...

Last post

Good luck, hopefully you will be able to get it back into operating condition again.

12 Replies

319 Views

Last post by Lady Fraktor
Fri Apr 29, 2022 6:19 pm
The New Orion GiantView ED 20x100

Last post by Refractordude « Fri Apr 29, 2022 1:39 am
Replies: 5
by Refractordude » Thu Apr 28, 2022 5:48 pm

First post

Are these Orion GiantView Ed 20x100 a clone of the APM 20x100 ED binoculars. Thanks all

Last post

A friend has the ones that Bigzmey has linked to, excellent views with them.
If you enjoy binocular viewing these are outstanding.

I think about...

5 Replies

180 Views

Last post by Refractordude
Fri Apr 29, 2022 1:39 am
Finally ordered a Baader Ortho

Last post by Lady Fraktor « Wed Apr 20, 2022 6:16 am
Replies: 11
by omeek » Thu Apr 14, 2022 8:52 pm

First post

After hearing so many great things about the Baader Orthoscopic EP last year from some of you I added it to my wishlist and finally ordered it today....

Last post

Don't shoot your eye out! You know, 5mm eye relief. :D

5 mm is downright expansive compared to some I have! :lol:

11 Replies

356 Views

Last post by Lady Fraktor
Wed Apr 20, 2022 6:16 am
Monocular review

Last post by JayTee « Sun Apr 10, 2022 9:37 pm
Replies: 4
by Butterfly Maiden » Thu Apr 07, 2022 3:30 pm

First post

I have just come across this review - Why Is This £54 Monocular Better Than £3000 Telescopes?

It sounds amazing, but is it too good to be true?...

Last post

One of the reasons why this forum exists -- to help dissuade anyone who wants to spend £54 on optical garbage!

4 Replies

201 Views

Last post by JayTee
Sun Apr 10, 2022 9:37 pm
Binoviewers - taking the plunge...

Last post by davesellars « Fri Apr 08, 2022 6:13 pm
Replies: 17
by davesellars » Fri Apr 01, 2022 12:43 pm

First post

OK, so I have been thinking for some time how best to get higher power with comfort for lunar and planetary observations - mulling over a barlow or a...

Last post

I don't believe you will reach focus with 2 diagonal or 2 zoom but if you already have those you may try as well.

I think you're correct regarding...

17 Replies

627 Views

Last post by davesellars
Fri Apr 08, 2022 6:13 pm
UHC/LPR FILTER HELP

Last post by Bigzmey « Wed Mar 30, 2022 6:57 pm
Replies: 4
by Richlen-Peter » Wed Mar 30, 2022 4:05 pm

First post

I have a Celestron Powerseeker 80 EQ Refracting telescope, with an 24-8mm zoom eyepiece. A 24mm, 10mm, and 4mm eyepieces. I recently purchased a 1.25...

Last post

I have a Celestron Powerseeker 80 EQ Refracting telescope, with an 24-8mm zoom eyepiece. A 24mm, 10mm, and 4mm eyepieces. I recently purchased a 1.25...

4 Replies

266 Views

Last post by Bigzmey
Wed Mar 30, 2022 6:57 pm
Straight Spotting Scope???

Last post by Richard « Sat Mar 26, 2022 1:55 pm
Replies: 9
by Colorado Luckydog » Thu Mar 24, 2022 12:46 pm

First post

I had no idea I was going to develop a taste for star gazing and I just bought a straight spotting scope. It's a Vortex Razor 27-60X85. What would be...

Last post

Though not ideal any scope can be used for Astronomy , spotting scopes , the quality ones are good , but looking up makes it uncomfortable , I wonder...

9 Replies

625 Views

Last post by Richard
Sat Mar 26, 2022 1:55 pm
The Effects Of A Step-Down Adapter For 2" EPs

Last post by OzEclipse « Sat Mar 26, 2022 7:38 am
Replies: 6
by JayTee » Tue Mar 22, 2022 9:34 pm

First post

I am awaiting delivery of a step-down adapter for my 2 eyepieces. It will allow me to use my 2 eyepieces in a 1.25 focuser. The 2 eyepieces I would...

Last post

Hi Jay Tee

You might also get some internal reflections from the eyepiece barrel and some UW eyepiece designs are negative eyepieces, the field stop...

6 Replies

472 Views

Last post by OzEclipse
Sat Mar 26, 2022 7:38 am
Understanding the (so-called) Dawes Limit

Last post by helicon « Sun Mar 20, 2022 2:43 pm
Replies: 2
by mikemarotta » Wed Nov 03, 2021 10:20 am

First post

Hence it follows that the tests of separating power furnished by close double stars are by no means to be relied on as determining the character of a...

Last post

Very interesting piece Mike. Thanks!

2 Replies

15774 Views

Last post by helicon
Sun Mar 20, 2022 2:43 pm
7mm Old vs. New

Last post by BFaucett « Sat Mar 19, 2022 6:16 pm
Replies: 8
by Jones » Mon Feb 14, 2022 4:10 pm

First post

20220213_103227.jpg

Just bought a 6.8mm Univ. Optics flat top ortho from ebay and wanted to compare against the older and newer 7mm's I have. The...

Last post

`
New line from Astronomics:

Astro-Tech UWA 82°

4, 7, 10, 13, 16, 28 mm (The 28 is a 2 inch.)

The 4 and 28 mm are currently in stock....

8 Replies

717 Views

Last post by BFaucett
Sat Mar 19, 2022 6:16 pm

Return to Board Index

TheSkySearchers.com

TheSkySearchers.com

Optics