Eyepieces

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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

~

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

646 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...

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

13 Replies

1094 Views

Last post by Bigzmey
Mon Dec 05, 2022 9:52 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

~
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,...

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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

647 Views

Last post by Don Pensack
Thu Nov 24, 2022 3:39 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...

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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

900 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

2771 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

610 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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First post

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

2384 Views

Last post by Razz
Tue Oct 04, 2022 11:46 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

1046 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...

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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

4452 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

356 Views

Last post by Shorty Barlow
Mon Sep 12, 2022 12:08 am
24mm Explore Scientific 68° Series

Last post by Shorty Barlow « Sun Sep 11, 2022 9:12 pm
Replies: 13
by Shorty Barlow » Sat Sep 10, 2022 3:44 pm

First post

A couple of years ago I bought the 1.25”, 68° Explore Scientific 24mm eyepiece. This was intended specifically as a rich field eyepiece for my 72ED...

Last post

I think my 24mm 68° EP has been my best investment in this hobby.
Mine is an Orion brand, I believe it was made by Baader, just the perfect EP IMHO...

13 Replies

1281 Views

Last post by Shorty Barlow
Sun Sep 11, 2022 9:12 pm
GSO 2" SuperView Eyepiece - 42mm

Last post by Shorty Barlow « Thu Sep 08, 2022 8:20 pm
Replies: 20
by JayTee » Wed Sep 07, 2022 9:02 pm
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First post

I need a big piece of glass...

Does anyone have any experience with the GSO 2 SuperView Eyepiece - 42mm EP?
Link

Will it work well in the C6R HD 6...

Last post

Pentax XW is ~700g, Pentax XL is ~400g. :)

Your TV Plossl (great EP BTW) is ~500g.

It is a heavy Plossl lol.
20 Replies

1879 Views

Last post by Shorty Barlow
Thu Sep 08, 2022 8:20 pm
Altair Lightwave 3x Flat Field Tele Extender

Last post by Shorty Barlow « Thu Sep 08, 2022 6:20 pm

by Shorty Barlow » Thu Sep 08, 2022 6:20 pm

The 1.25“ Altair Lightwave 3x Flat Field Tele Extender 'Barlow' weighs in at 195 grams and I make it 105mm tall. One of the reasons (if not the...

0 Replies

322 Views

Last post by Shorty Barlow
Thu Sep 08, 2022 6:20 pm
25mm Celestron X-Cel LX

Last post by Richard « Thu Sep 08, 2022 2:27 pm
Replies: 5
by Shorty Barlow » Wed Sep 07, 2022 9:58 pm

First post

The Celestron X-Cel LX has an apparent field of view of 60º. There are six internal elements. I have no information on the amount of groups. The...

Last post

Yes the Celestron X-Cel XL are good have a few , I still have the old 10mm Celestron X-Cel , I purchased it many years ago thinking it must be better...

5 Replies

586 Views

Last post by Richard
Thu Sep 08, 2022 2:27 pm
Unusual 4.8mm Orthoscopic

Last post by Shorty Barlow « Wed Sep 07, 2022 2:40 pm
Replies: 2
by Shorty Barlow » Wed Sep 07, 2022 7:26 am

First post

This unusual ‘alleged’ Abbe fully multi-coated orthoscopic has a focal length of 4.8mm. I say ‘alleged’ as I don’t actually know if this is indeed a...

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These have been out at least 15 years, made in china, the middle range lenses are pretty good, think 7.7 mm and 10.5. The 4.8 a little less so ....

2 Replies

353 Views

Last post by Shorty Barlow
Wed Sep 07, 2022 2:40 pm
GSO 3x ED Barlow

Last post by Shorty Barlow « Wed Sep 07, 2022 9:17 am
Replies: 5
by Shorty Barlow » Tue Sep 06, 2022 10:28 am

First post

I own a 2x GSO Barlow. It is lightweight, simple, and I like its ergonomics. It performs well with my modified ST80 and a Celestron zoom. I have a 5x...

Last post

Well I suppose end of the the day its what we pay , cheap perhaps 50% are ok , pay more and 70% , pay a premium and 99% are good , so if one is lucky...

5 Replies

573 Views

Last post by Shorty Barlow
Wed Sep 07, 2022 9:17 am
SvBony F9125A Barlow Element

Last post by Shorty Barlow « Wed Sep 07, 2022 9:07 am

by Shorty Barlow » Wed Sep 07, 2022 9:07 am

SVBONY 1.25'' 2X Barlow Lens Telescope M28.5*0.6 Thread for Standard Monocular Optics Compact Eyepiece 31.7mm

~ SvBony (sic)

I thought I was being...

0 Replies

300 Views

Last post by Shorty Barlow
Wed Sep 07, 2022 9:07 am
Binoviewers - taking the plunge...

Last post by davesellars « Wed Sep 07, 2022 8:34 am
Replies: 49
by davesellars » Fri Apr 01, 2022 12:43 pm
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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

Thanks Andrey! I think from viewing through the 12.5mm I'm pretty close to the limit especially with only 42 degrees with a manual mount. If someone...
49 Replies

4795 Views

Last post by davesellars
Wed Sep 07, 2022 8:34 am
Orion Tri-Mag 1.25" 3x Barlow Lens

Last post by Shorty Barlow « Wed Sep 07, 2022 7:57 am

by Shorty Barlow » Wed Sep 07, 2022 7:57 am

They say all things come to those who wait. I don’t know who ‘they’ are, but they may actually have a good argument. I still required a relatively...

0 Replies

263 Views

Last post by Shorty Barlow
Wed Sep 07, 2022 7:57 am
BST StarGuider 3x Deluxe Barlow

Last post by Shorty Barlow « Wed Sep 07, 2022 7:41 am

by Shorty Barlow » Wed Sep 07, 2022 7:41 am

In my continuing (and almost Arthurian) quest to find a 3x Barlow that meets my particular requirements I may have found the grail, or at least...

0 Replies

236 Views

Last post by Shorty Barlow
Wed Sep 07, 2022 7:41 am
Orion E-Series/SvBony SV135 7-21mm Zooms

Last post by Shorty Barlow « Wed Sep 07, 2022 1:47 am

by Shorty Barlow » Wed Sep 07, 2022 1:47 am

I bought the Orion Telescopes & Binoculars E-Series and SvBony SV135 7-21mm zoom eyepieces for £56.99 and £44.99 respectively.

They undoubtedly...

0 Replies

851 Views

Last post by Shorty Barlow
Wed Sep 07, 2022 1:47 am
GSO 'StellaLyra' 30mm SuperView

Last post by Shorty Barlow « Tue Sep 06, 2022 9:22 pm

by Shorty Barlow » Tue Sep 06, 2022 9:22 pm

The Guan Sheng Optical ‘StellaLyra’ 30mm SuperView weighs in at a respectably lightweight 285g. It has a claimed 68° AFOV with five lens elements in...

0 Replies

228 Views

Last post by Shorty Barlow
Tue Sep 06, 2022 9:22 pm
Vixen Deluxe or Tele Vue Barlow?

Last post by Shorty Barlow « Tue Sep 06, 2022 10:05 am

by Shorty Barlow » Tue Sep 06, 2022 10:05 am

I have a large collection of 2x Barlows. I also own a fair few 3x Barlows. The vast majority of my 2x Barlows are the short type. These are often...

0 Replies

214 Views

Last post by Shorty Barlow
Tue Sep 06, 2022 10:05 am
36mm Baader Hyperion

Last post by Shorty Barlow « Mon Sep 05, 2022 7:33 pm
Replies: 5
by LDW47 » Thu Sep 01, 2022 3:17 pm

First post

Just bought one to use in my NP101 and several other smaller refractors for low power viewing. Any personal comments of actual experiences ? I am...

Last post

I've always thought the Hyperion Aspherics worked well in my refractors.

5 Replies

474 Views

Last post by Shorty Barlow
Mon Sep 05, 2022 7:33 pm
SVbony 8mm plossl 207 SPL

Last post by Shorty Barlow « Mon Sep 05, 2022 4:28 pm
Replies: 8
by Jones » Mon Jan 24, 2022 2:20 am

First post

20220121_132608.jpg

Have had a lot of their threaded adapter rings. Finish is nice and they always threaded with other SV and other brands of...

Last post

My guess is that these are made by the same manufacturer.

I have no idea who actually manufacture the Expanse clones though.

8 Replies

5964 Views

Last post by Shorty Barlow
Mon Sep 05, 2022 4:28 pm

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