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Equipment Discussions >> Eyepieces

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Jaimo!
Pooh-Bah
*****

Reged: 10/11/07

Loc: Exit 135 / 40° North
Re: Orthoscopic eyepeices new [Re: JustaBoy]
      #6480714 - 04/22/14 08:17 AM

Quote:

Lot of money anyway you look at it for a 3oz eyepiece:-)




Especially the ZAO II...


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Sasa
professor emeritus


Reged: 11/03/10

Loc: Ricany, Czech Republic
Re: Orthoscopic eyepeices new [Re: Astrojensen]
      #6480740 - 04/22/14 08:35 AM

Quote:

Quote:

orthos are it, they've come and gone, and have come again, keeps coming back




No, they've been here since they first arrived, because never left in the first place!


Clear skies!
Thomas, Denmark




Right Thomas, my vintage, about hundred years old Zeiss orthos keep their pace with modern eyepieces! I simply do not now why I was not using them, they were staying sealed in the box for about one year before I discovered that they are not only useable but to my surprise really great! Now my old 15mm ortho is my main Jupiter eyepiece in f/20 refractor. Contrast and overall sharpness is on par with my 16mm TMB Monocentric, plus it provides slightly higher magnification that is a better match for Jupiter in 82mm lens.


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Astrojensen
Post Laureate
*****

Reged: 10/05/08

Loc: Bornholm, Denmark
Re: Orthoscopic eyepeices new [Re: ibase]
      #6480887 - 04/22/14 10:11 AM

Quote:

their popularity seems to ebb & flow, like when the widefields came around, they've become all the rage, with the orthos relegated to the background; now the orthos (Japanese makes) are waging a comeback, they just keep coming back to the mainstream scene.




In Europe, they never really left the mainstream scene at all. Every visual observer I know/knew seem(ed) to have some, even if they also owned more recent designs. Zeiss sold loads of them, as did Takahashi, Vixen and Tani Optics (same as UO orthos).

Visual observers over here never forgot what a good ortho is capable of, certainly not the planetary observers, but also to some degree deep-sky specialists.

Or at least, that is how it used to be. I do think the newest generations of visual observers, those starting within the last few years, have mostly heard just of wide-field eyepieces and many want eyepieces with very long eye relief and/or very large field of view. To them, an ortho is a relic from the past.

Or maybe I am completely wrong and it is ME, who is a relic from the past, completely out of touch with how things have evolved around me. The more I think about it, the more that definitely seems like a possibility... Perhaps orthos did become a "subculture" many years ago and it's just me, who have been part of that subculture without really realizing it.

Well, as it is, I am in both camps. Both wide-field designs and orthos have their places. Right now, I want a pair of 32mm Takahashi Abbe orthos for my binoviewer, but man, the $$$$$... I may have to settle for Baader Classic 32mm Plössls. Oh, the horror!


Clear skies!
Thomas, Denmark


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JustaBoy
Post Laureate
*****

Reged: 06/19/12

Re: Orthoscopic eyepeices new [Re: Astrojensen]
      #6481165 - 04/22/14 12:55 PM

"To them, an ortho is a relic from the past."


Me too:-( - But that's ok, Thomas. - Just look how much Money my narrow mindedness has saved me.

Problem is, I can't seem to find any of it:-(


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jrbarnett
Eyepiece Hooligan
*****

Reged: 02/28/06

Loc: Petaluma, CA
Re: Orthoscopic eyepeices new [Re: teelgul]
      #6481295 - 04/22/14 01:56 PM

Orthos - the "buggy whips" of the eyepiece world. Damn fine buggy whips they are, too. But who whips an automobile?

- Jim

Edited by jrbarnett (04/22/14 01:58 PM)


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JustaBoy
Post Laureate
*****

Reged: 06/19/12

Re: Orthoscopic eyepeices new [Re: jrbarnett]
      #6481332 - 04/22/14 02:14 PM

Go Ahead - Just Rub it In, you Young Wippersnapper, you!

:-)


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bremms
Carpal Tunnel
*****

Reged: 08/31/12

Loc: SC
Re: Orthoscopic eyepeices [Re: JustaBoy]
      #6481501 - 04/22/14 03:38 PM

They are easier to look through than a TV Plossl My 7mm UO circle t is still a great EP. I like my 7mm RGO a little more. The TV 7.4 is good, but more difficult to use. I prefer the UO or the RGO 7mm

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Jeff Morgan
Postmaster
*****

Reged: 09/28/03

Loc: Prescott, AZ
Re: Orthoscopic eyepeices new [Re: Astrojensen]
      #6481571 - 04/22/14 04:19 PM

Quote:

In Europe, they never really left the mainstream scene at all. Every visual observer I know/knew seem(ed) to have some, even if they also owned more recent designs. Zeiss sold loads of them, as did Takahashi, Vixen and Tani Optics (same as UO orthos).

Visual observers over here never forgot what a good ortho is capable of, certainly not the planetary observers, but also to some degree deep-sky specialists.




Perhaps this is the influence of marketing and conspicuous consumption, things we have no shortage of on this side of the Atlantic.

Up until about 5 years ago I was caught up in the marketing spell too. Rediscovery is nice too.


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bremms
Carpal Tunnel
*****

Reged: 08/31/12

Loc: SC
Re: Orthoscopic eyepeices new [Re: Jeff Morgan]
      #6481691 - 04/22/14 05:24 PM

A few years ago, the used prices were low for UO green letters. I picked up a few for under $35.00 and one for under 30.00 shipped. They are about double that these days. Still looking for a 5mm

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bayou sky
member


Reged: 03/09/14

Re: Orthoscopic eyepeices new [Re: JustaBoy]
      #6482228 - 04/22/14 10:26 PM

I'm not that familar with the various orthos

But I was looking at a used one for sale.

"Celestron by Vixen 7mm Ortho 1.25" Eyepiece Orthoscopic Circle V Japan" for $42 shipped

My question

1) Is this a good eyepiece?

2) If so, is this a good price?

I'm interested in this 7mm for planetary detail

My scope is a 8" Dobs F/6 Orion XT8 1200FL


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JustaBoy
Post Laureate
*****

Reged: 06/19/12

Re: Orthoscopic eyepeices new [Re: bayou sky]
      #6482253 - 04/22/14 10:39 PM

It's not an Ortho in the classic Abbe sense - It uses 2 doublets instead of a triplet and a singlet. - More like a Plossl.

In short, if you are wanting to try an Ortho in the classic sense, keep looking.


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bayou sky
member


Reged: 03/09/14

Re: Orthoscopic eyepeices new [Re: JustaBoy]
      #6482282 - 04/22/14 10:59 PM

Thanks

I thought so. I knew some of the orthos were two doublets under a volcano top' but did not know enough but did not know which ones.

I,ll keep looking


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Traveler
Pooh-Bah


Reged: 08/19/07

Loc: The Netherlands
Re: Orthoscopic eyepeices new [Re: teelgul]
      #6482524 - 04/23/14 02:30 AM

Hi Vaidya,

I use an BGO 7mm in my A-P Traveler wich has almost the same specs as your CFF telescope. I use this ep when i want the last details out of the planets. This BGO can do that with my telescope and not only with the APO, it does a really good job in SCT's as well.

In a planet observing session i use first some TV Radian's for long periods of observing because of the bigger ER. When i have the details in my mind, then i take the BGO for a shorter time to squeeze the last details.

So Ortho's will work with your telescope. But they are not very comfortable for very long sessions imo.

How is your CFF doing btw?


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Astrojensen
Post Laureate
*****

Reged: 10/05/08

Loc: Bornholm, Denmark
Re: Orthoscopic eyepeices new [Re: jrbarnett]
      #6482603 - 04/23/14 04:57 AM

Quote:

Orthos - the "buggy whips" of the eyepiece world. Damn fine buggy whips they are, too. But who whips an automobile?




I sure would like to whip my car once in a while, when it acts up.

But I think the analogy is somewhat flawed. Orthos are still mighty fine eyepieces, even if more wide field designs exist. They are by no means made nearly useless by modern eyepieces, unlike the horse, which is not supported by modern infrastructure. I used orthos for much of my observing for many years and were perfectly happy with them. I now use wide-field designs for my deep-sky observing, but in my binoviewer, I still use narrow field eyepieces with the greatest possible image definition. I used to use UO orthos, but currently use 25mm Zeiss microscope eyepieces (a 1-2-1 König variety) and 40mm TS Superviews (probably plössls). I basically only use the 40mm TS Superviews because 40mm orthos were not available at the time I bought them. I am now looking into getting a pair of 32mm orthos.


Clear skies!
Thomas, Denmark


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teelgul
sage


Reged: 09/02/11

Loc: Australia
Re: Orthoscopic eyepeices new [Re: Traveler]
      #6482656 - 04/23/14 06:48 AM

Thanks Patrick , for the info from you and all others. The makers of the scope
Suggested that I should also try some, orthos to get some perfect views.i think i will try the new Fujiyama orthos, of Japanese make but cheaper than Tak.
Yes the CFF is great, and stubby,but its heavier, than your AP, I feel.
Cheers
Vaidya


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Fomalhaut
scholastic sledgehammer


Reged: 08/16/08

Loc: Switzerland
Re: Orthoscopic eyepeices new [Re: richardr]
      #6482826 - 04/23/14 09:12 AM

Quote:

For an F6, I would say no. It is a little too fast and the point of a fast scope is the wide field. Orthos have a narrow FOV. Orthos IMO are for long focal length scopes and planetary viewing. YMMV




For high powers on my FCT 100/640 Fluorite triplet, I'm exclusively using the Tak Hi-Orthos 4mm (160x) and 2.8mm (230x) with 0.96"-barrel.
Both are of 1-3--2 design (Ortho plus integrated matched Barlow or Smyth-lens). => In fact, the 1-3-part of the "2.8" is actually a 5mm and the "4" is a 7mm ortho, both including their own Barlow.

Orthos are especially good if used with scope focal-lengths longer than f/8 and that's exactly what these built-in Barlow/Smyth-lenses do for my f/6.4 relatively short-focus-apo! Additionally, they also prolong the eye-relief plus flatten the field => pinpoint stars to the edge.
These eyepieces were developped by Takahashi for providing comfortable high magnifications to their short-focus FCT apochromatic refractors.

On my own FCT, these have turned out to be much easier to use than good standard orthos and (thanks to the prolonged telescopic f.l.) optically at least the same good as any of them.

In good seeing, the 2.8-HiOr (230x) shows all of the Jovian's detail that's optically accessible to any 4-incher, and it does so to perfection: No loss of (even low contrast-) detail compared to 160x! - Well, also no real gain: Everything (not more and not less) that is visible at 160x can also be seen at 230x, but more extended and therefore a little easier.

My wonderful (though non-ortho) Pentax XO-5.1 OTOH, compared to these two and also in excellent seeing, cannot quite provide my eyes at mag 125x with the same information of Jovian surface Detail in the same scope. => This magnification seems just to be a bit below (Jovian) optimum, which I rather consider to be the HiOr-4's pupil-diameter of 0.63mm than the XO's 0.8mm.
For Saturn and Mars in excellent seeing, I prefer the 2.8mm (230x).

In bino-mode, planets appear definitely bigger than at same magnification in mono-mode. Therefore, with my TV-Binoview plus 2x Barlow/glasspath-corrector, I'm exclusively using two 9mm Volcano-Top-Orthos (Tani=U.O.). The resulting 142x (0.7mm) seems to be optimum for stereo-viewing Jupiter with this telescope.

Chris

Edited by Fomalhaut (04/23/14 02:10 PM)


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azure1961p
Postmaster
*****

Reged: 01/17/09

Loc: USA
Re: Orthoscopic eyepeices new [Re: Fomalhaut]
      #6484560 - 04/23/14 10:54 PM

I love my Orthos but in an f/10 sct and 8" f/9 newt and f6.8 refractor so I never deal with the demons faster scopes reveal. I will say you have to have the ortho mindset meaning - wide field is not on the table. Its not a Pentax with the sprawly view and some people MUST have or get bothered if its not there. I'm in the minority as I can take or leave UWA and so 45-50 degree apparent fields are fine.

Pete


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Subaru45
member


Reged: 03/07/13

Loc: Central Wyoming
Re: Orthoscopic eyepeices new [Re: azure1961p]
      #6484715 - 04/24/14 12:41 AM

Early this morning I saw an ad in the classifieds; OPTICA b/c OR 12.5mm for sale. I think I saw a reference to these eyepieces some months ago , but so far haven't been able to find anything in my search. Is there anyone out there who can refresh me on the OPTICA b/c line?

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JustaBoy
Post Laureate
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Reged: 06/19/12

Re: Orthoscopic eyepeices new [Re: Subaru45]
      #6484719 - 04/24/14 12:43 AM

It is like the older University Optics Volcano Top Orthos, a Circle-T, made by Tani in Japan.

A fine eyepiece - I have used them for 50yrs.


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Subaru45
member


Reged: 03/07/13

Loc: Central Wyoming
Re: Orthoscopic eyepeices new [Re: JustaBoy]
      #6484726 - 04/24/14 12:50 AM

Thanks Chuck!

Richard


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