29 replies to this topic

[denis0007dl]

Eyelenses diameters:

 

Ethos 13mm
29.25mm

 

XWA 13mm
29.35mm

 

Backlenses diameter:

 

Ethos 13mm
25.04mm

 

XWA 13mm
23.02mm

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Edited by denis0007dl, 13 September 2024 - 03:12 PM.

[denis0007dl]

Vew at eyelenses...

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[denis0007dl]

Ethos 13mm precise weight...

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[denis0007dl]

XWA 13mm precise weight...

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[denis0007dl]

For weight measuring, on both rubber eyeguards were removed.

[denis0007dl]

I wish 2" barel to be able to remove on Ethos 13mm, so eyepiece could go more INSIDE of Baader eyepiece holders, here is how it looks like back...

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[Highburymark]

Interesting comparison. The XWAs are surprisingly light. Weight matters when you’re binoviewing widefields, so I ended up going for Nagler T6s at this focal length - for binoviewing the Sun in Ha and for expansive views of the Moon.
I’d be interested whether you see any optical differences between the XWAs and Ethos 13 in a binoviewer?

[denis0007dl]

I love all Naglers in bino mode, but Im always leaving marks on lenses from my eyeleashes, while thats NOT the case on XWAs and Ethos eyepieces.

Im waiting to make optical comparation these days....

From now what I can feel, is that Ethos have tiny bit more eye releaf.

[Spartinix]

I tested these in 2017 and the Ethos really made a difference on glare/contrast for seeing a dim object with a relatively bright nearby star just in and outside of the field.
Perhaps the XWA has been improved since then.
Try NGC 404?

[denis0007dl]

...Ethoses...

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[denis0007dl]

...XWAs...

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[DRodrigues]

...Ethoses...

You can use the Ethoses with the 2" barrel: - remove de BV ep holders and use 2" to T2 adapters on the Ethoses 2" barrels ...

[denis0007dl]

You can use the Ethoses with the 2" barrel: - remove de BV ep holders and use 2" to T2 adapters on the Ethoses 2" barrels ...

Was thinking about it, do you have an link?

[ABQJeff]

Looking forward to the optical test!

 

The lower weight, ease of using with 1.25” and the substantially lower cost of the XWAs means the Ethos will have to be substantially better optically than the XWAs to say the Ethos are the better BV choice.

[DRodrigues]

Was thinking about it, do you have an link?

https://www.teleskop...lter-thread-378

https://www.teleskop...o-t-thread-5389

https://www.teleskop...read-short-2839

https://www.teleskop...terthread-13710

 

Just remember you can also use

https://www.teleskop...t2-thread-10392

There was a 2" Ultrashort Eyepiece Clamp to T2 that seems is no longer produced...

[denis0007dl]

https://www.teleskop...lter-thread-378

https://www.teleskop...o-t-thread-5389

https://www.teleskop...read-short-2839

https://www.teleskop...terthread-13710

 

Just remember you can also use

https://www.teleskop...t2-thread-10392

There was a 2" Ultrashort Eyepiece Clamp to T2 that seems is no longer produced...

Tahnk you!

Thinking to use same with Ethos 17mm piar

Both Ethos 17mm and 13mm have same diameter!

 

Denis

[denis0007dl]

So, lets back to Ethos vs XWA comparation:

 

DAYTIME:

weather here is cloudy, and rainy in part of the day, and next 10 days weather prognose seems will stay the same, so Im basing to test on what Im having.

 

I was using different anthennas, trees, cheminies vs grey sky, as most interesting targets.

Some fat anthennas with rus part, rusted, not rusted, and semi rusted screws on it, were most demandin gtargets, in part of the time after rain, with shiny drops of rain.

 

In short, XWA eyepieces in some 60% observing time seems to snap into focus slightly easier, and showing tiny bit more details, with tiny bit sharper image, but it was not all time, and it was hard to see any significant advantage.

 

NIGHT:

 

while I ad no stars, I was using distant LED lights on sea marina, distant LED and normal street lights, and some tiny sources of light on ships saying on marina calm.

 

Interesting is, on very first view and switch between epcs, I was imeadiately and very noticable able to see diff between two, where Ethos provide NOTICABLE LESS scattered light, with darker image background, and more easily visible tiny sources of distant small light.

 

Any object were cleaner and sharper in Ethos, no matter how dark, bright, etc it was.

 

When I move street lights out of FOV, or at extreme edge, Ethos have here also noticable advantages:

 

1. sharper edges

2. not nearly so many reflections/ghost images, with noticable less glare.

 

 

Kind regards,

Denis

[denis0007dl]

Just found some adapters I had at home, so I made one side directly attachable to T2 😀

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[Spartinix]

I remember too now, the reflections/ghost images of the star near NGC404 in Andromeda.
The difference with the Ethos was amazing.

Edited by Spartinix, 15 September 2024 - 12:37 PM.

[denis0007dl]

I remember too now, the reflections/ghost images of the star near NGC404 in Andromeda.
The difference with the Ethos was amazing.

Yes.

 

I nostalgically remembring the day, and the time once first Ethos eyepiece was introduced, and it was 13mm.

I was staring into picture every day, for a long period of time.

 

Always had dreamed to have it, and now my dreams comes true x2 

 

Thanxs to mr. Nagler from TeleVue company making these.

 

Denis

[Spartinix]

Me too haha. I don't have one right now but maybe again one day when I get to observe under better seeing.
Even 180x is pushing it most of the time and the Ethos 13 gives me ~218x of power (in mono with Paracorr, let alone with bv + at least 1.3x with Siebert OCA).

[denis0007dl]

XWAs advantage is (except lighter weight and way cheaper price), they fit much more deeper and SAFER inside Baader eyepiece holders, while Ethoses doesnt so much.

[denis0007dl]

Ethos 13mm epcs directly screwed onto binoviewer + possible diopter adjustment:

 

because eyepiece holders are removed, here is saved weight and light path + setup is supersturdy.

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[denis0007dl]

Here is how looks like when eyepiece holders are included...

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[denis0007dl]

...and here is MOD where eyepieces are in 2" mode screwed onto binoviewer.

Same way I will in 1 week using Nikon 17mmHW set...

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