Jump to content

  •  

CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.

Photo

“Best” 10 mm eyepiece.

  • Please log in to reply
54 replies to this topic

#26 Shorty Barlow

Shorty Barlow

    Gemini

  • *****
  • Posts: 3,008
  • Joined: 15 Sep 2015
  • Loc: Lloegyr

Posted 13 August 2020 - 11:16 AM

For 10mm exactly, I have the XW, Nikon SW & a Vixen LV. But 10mm is at the good end of 8-24 zooms, and 2x Barlowing 20mm or 3x 30mm or 4x 40mm or 5x 50mm, so a few choices....   

 

sml_gallery_249298_11063_95648.jpg

 

Hmmm ... a zoom's a bit of a cheat if you ask me, but if we're including them ....

 

sml_gallery_249298_11063_1987.jpg


  • 25585 likes this

#27 RickM.

RickM.

    Explorer 1

  • -----
  • Posts: 83
  • Joined: 28 Jun 2020

Posted 13 August 2020 - 02:26 PM

med_gallery_249298_5348_599808.jpg

 

I'm a bit spoilt for choice with 10mm.

The 4 on the right look like they were taken away from their mother too young!


  • esd726, areyoukiddingme and Shorty Barlow like this

#28 RogerLaureys

RogerLaureys

    Vostok 1

  • *****
  • Posts: 180
  • Joined: 02 Feb 2005
  • Loc: Hasselt,Belgium

Posted 13 August 2020 - 03:10 PM

I prefer the Delos 10 above the Pentax XW 10 which I sold. For critical planetary observations I prefer the TMB super monocentric 10 mm despite it's narrow FOV.


  • SteveC and payner like this

#29 Shorty Barlow

Shorty Barlow

    Gemini

  • *****
  • Posts: 3,008
  • Joined: 15 Sep 2015
  • Loc: Lloegyr

Posted 13 August 2020 - 03:24 PM

The 4 on the right look like they were taken away from their mother too young!

I think the SvBony ended up in jail.


  • j.gardavsky and RickM. like this

#30 esd726

esd726

    Apollo

  • *****
  • topic starter
  • Posts: 1,392
  • Joined: 30 Sep 2004
  • Loc: Rochester, IN

Posted 13 August 2020 - 03:32 PM

Hello, I'm the bad voice on your shoulder.  Nah, Rick...you NEED one.  Listen to me, Rick!  Lol!  

 

I've got the 7mm XW, and love it.  Maybe you could go old school, and find a cool Ortho.  Or maybe both!  "Listen to us, Rick!  new toy time!"

lalalala.gif    lol.gif


  • JoshUrban likes this

#31 GeneT

GeneT

    Ely Kid

  • *****
  • Posts: 15,799
  • Joined: 07 Nov 2008
  • Loc: South Texas

Posted 13 August 2020 - 03:56 PM

You have a 10 inch Dob; I have a 12.5 incher. My eyepiece jumps go from a 21 Etho/31 Nagler, 13 Ethos, 8 Ethos/Delos, 6 Ethos/Delos and 4.5 Ethos/Deols. I have a 10 Radina. A 10 is my least used eyepiece, so that is why I did not upgrade to a 10 Ethos or Delos. I found going from a 13 to a 10 did not give me the presentation I wanted. Going from a 13 to an 8 was just right. Most reading this will not agree with my preferences, and will give you their recommendations for a 10. 



#32 esd726

esd726

    Apollo

  • *****
  • topic starter
  • Posts: 1,392
  • Joined: 30 Sep 2004
  • Loc: Rochester, IN

Posted 13 August 2020 - 04:49 PM

You have a 10 inch Dob; I have a 12.5 incher. My eyepiece jumps go from a 21 Etho/31 Nagler, 13 Ethos, 8 Ethos/Delos, 6 Ethos/Delos and 4.5 Ethos/Deols. I have a 10 Radina. A 10 is my least used eyepiece, so that is why I did not upgrade to a 10 Ethos or Delos. I found going from a 13 to a 10 did not give me the presentation I wanted. Going from a 13 to an 8 was just right. Most reading this will not agree with my preferences, and will give you their recommendations for a 10. 

 

That’s kind of what I’m thinking.  I think that is why I got rid of my 10s back when I did (that and the wanting to try new stuff) 



#33 payner

payner

    Vanguard

  • *****
  • Posts: 2,168
  • Joined: 22 Mar 2007
  • Loc: Bluegrass & Cumberland Valley Regions, Kentucky

Posted 13 August 2020 - 06:05 PM

I prefer the Delos 10 above the Pentax XW 10 which I sold. For critical planetary observations I prefer the TMB super monocentric 10 mm despite it's narrow FOV.

Couldn't agree more with your choice of a 10 mm Super Monocentric.


  • RogerLaureys likes this

#34 Starman1

Starman1

    Vendor (EyepiecesEtc.com)

  • *****
  • Vendors
  • Posts: 47,663
  • Joined: 23 Jun 2003
  • Loc: Los Angeles

Posted 13 August 2020 - 06:18 PM

Lab test of contemporary high end 10mm eyepieces (use Google Translate if you don't read French):

https://web.archive....laires_10mm.pdf

Short summary:

Delos--16/20

Ethos--15/20

XW--12/20

NAV-SW--11/20 (NAV-HW not tested)

Tak UW--10.5/20

Luminos--8/20

I have never used the Tak UW, but otherwise, I would have ranked them identically.

Nothing was 20/20, so there is room for improvement.


  • esd726, RogerLaureys, Thomas_M44 and 1 other like this

#35 Starman1

Starman1

    Vendor (EyepiecesEtc.com)

  • *****
  • Vendors
  • Posts: 47,663
  • Joined: 23 Jun 2003
  • Loc: Los Angeles

Posted 13 August 2020 - 06:23 PM

You have a 10 inch Dob; I have a 12.5 incher. My eyepiece jumps go from a 21 Etho/31 Nagler, 13 Ethos, 8 Ethos/Delos, 6 Ethos/Delos and 4.5 Ethos/Deols. I have a 10 Radina. A 10 is my least used eyepiece, so that is why I did not upgrade to a 10 Ethos or Delos. I found going from a 13 to a 10 did not give me the presentation I wanted. Going from a 13 to an 8 was just right. Most reading this will not agree with my preferences, and will give you their recommendations for a 10. 

That's a function of focal length.

In my 12.5" scope, 13mm = 140x, 10mm = 183x, 8mm = 228x

I found the 140x to 228x too big a jump.  So 10mm became the obvious in between choice.

It also became my most-used eyepiece.

 

In my short focal length refractor, 13mm = 55x, and 8mm is 89x.  That doesn't seem like too big a jump (only 34x).

No need for an in between.



#36 rkelley8493

rkelley8493

    Surveyor 1

  • *****
  • Posts: 1,985
  • Joined: 19 Jan 2019
  • Loc: Southeast USA

Posted 13 August 2020 - 06:36 PM

Lab test of contemporary high end 10mm eyepieces (use Google Translate if you don't read French):

https://web.archive....laires_10mm.pdf

Short summary:

Delos--16/20

Ethos--15/20

XW--12/20

NAV-SW--11/20 (NAV-HW not tested)

Tak UW--10.5/20

Luminos--8/20

I have never used the Tak UW, but otherwise, I would have ranked them identically.

Nothing was 20/20, so there is room for improvement.

I think I have the English version of this article:

 

https://www.dropbox....Tested.pdf?dl=0


  • Dave Ponder and RickM. like this

#37 MitchAlsup

MitchAlsup

    Aurora

  • -----
  • Posts: 4,639
  • Joined: 31 Aug 2009

Posted 13 August 2020 - 06:41 PM

I was going to say the best 10mm is the 9ES120,

But I see you already have an 8mm.........{which you could always sell}......



#38 Starman1

Starman1

    Vendor (EyepiecesEtc.com)

  • *****
  • Vendors
  • Posts: 47,663
  • Joined: 23 Jun 2003
  • Loc: Los Angeles

Posted 13 August 2020 - 06:42 PM

I think I have the English version of this article:

 

https://www.dropbox....Tested.pdf?dl=0

a little different (I find it a bit more readable in its organization), but thank you very much.


  • rkelley8493 likes this

#39 RLK1

RLK1

    Viking 1

  • -----
  • Posts: 557
  • Joined: 19 Apr 2020

Posted 13 August 2020 - 07:25 PM

I think I have the English version of this article:

 

https://www.dropbox....Tested.pdf?dl=0

Thanks for this version.

My favorite 10mm eyepiece is the Ethos and I got a chuckle from the statement in the article that reads, "Its only fault: the eye relief of 15mm." Are you kidding me? 15mm isn't enough for a non eyeglass wearer? In the same context, the reviewer states, "The viewing comfort remains acceptable, but at that distance, eyelashes sometimes touch the eye lens and dirty it."Perhaps it's a female observer with some pretty heavy duty observing eyelashes at play... 


  • rkelley8493 likes this

#40 Will_S

Will_S

    Vostok 1

  • *****
  • Posts: 176
  • Joined: 20 Feb 2016
  • Loc: Santa Cruz, CA

Posted 13 August 2020 - 08:48 PM

Lab test of contemporary high end 10mm eyepieces (use Google Translate if you don't read French):

https://web.archive....laires_10mm.pdf

Short summary:

Delos--16/20

Ethos--15/20

XW--12/20

NAV-SW--11/20 (NAV-HW not tested)

Tak UW--10.5/20

Luminos--8/20

I have never used the Tak UW, but otherwise, I would have ranked them identically.

Nothing was 20/20, so there is room for improvement.

The summary scores are a bit misleading though, as every category got ranked and entered equally into the scoring, even though in some categories the differences would be visually imperceptible and in other categories the differences actually matter. Also note that both price and field of view entered into the scoring, which is maybe fair enough, but just looking at the scores without knowing that could be misleading. Finally, simple rank orders are not sensitive to how different things are between each step, e.g. is one extra degree AFOV really worth favoring one eyepiece over another?  Is costing $21 more the same difference as costing $276 more? The price scores also do not reflect current US prices well, other than the Luminos being the cheapest. 

 

The article wraps up with (butchered by google translate, and I don't fully agree given the considerations above):

"As in our previous test, the Televue Ethos is found in the leading duo. Without hesitation, this is the best choice for those looking for a wide field. But beware, he pays a heavy price. More surprisingly, the new Delos from the same brand comes out on top while its field is rather limited. It even dethrones the benchmark of the genre: the Pentax XW. If you are looking for performance above all else, this is the right choice. Let us also consider the Nikon NAV10-SW, whose reasonable weight and size make an attractive solution for telescopes sensitive to imbalance such as Dobsons. The two losers in the test are the disappointing Takahashi TAK10-UW for its price and the Celestron Luminos. This one occupies the last step. A defeat to be qualified, however: its performance is good on telescopes open at f / 7 and above, and its price remains attractive. It is therefore a solution to consider for Cassegrain telescopes."

 

To me, the Nikon stands out as the "winner" if the Ethos is too expensive or too heavy -- edge correction in fast scopes second only to the Ethos, weight light enough not to cause balance problems, and 72° AFOV is plenty for me (and barely different from the Delos, and Pentax, but they both score 2 points higher due to a 1% larger FOV).


Edited by Will_S, 13 August 2020 - 09:18 PM.

  • OneGear and rkelley8493 like this

#41 cimar

cimar

    Vostok 1

  • *****
  • Posts: 101
  • Joined: 13 Nov 2018

Posted 13 August 2020 - 10:03 PM

In my 15" and 10" f/5 scopes I use the 10mm Delos a lot. My eyepiece set is 31mm 17mm 10mm 6mm and 3.5mm.



#42 Starman1

Starman1

    Vendor (EyepiecesEtc.com)

  • *****
  • Vendors
  • Posts: 47,663
  • Joined: 23 Jun 2003
  • Loc: Los Angeles

Posted 14 August 2020 - 12:55 AM

What stood out for me is the measurement of on-axis wavefront error after passage through the eyepieces:

At f/7:

Delos: 1/133 wave

Ethos: 1/76 wave

Pentax XW: 1/89 wave

NAV-SW  1/48 wave

Tak UW  1/106 wave

Luminos  1/66 wave

 

What this points out is that while amateurs are always looking for some magic bullet, the eyepiece that is notably better on axis, the truth is that the 

differences in eyepieces are pretty much not at the center.  Yeah, the Delos was measurably better.  But the worst in the test--the Nikon NAV SW was 1/48 wave.

That would be a world-class miracle in a mirror or a refractor objective. 

If you have a good telescope that yields 0.125 wave on axis on the wavefront (and that is a great optic), adding another 0.02-0.008 wave error to that is not going to be consequential.

At least not on axis.


  • payner, John Gauvreau, mwedel and 3 others like this

#43 25585

25585

    Voyager 1

  • *****
  • Posts: 10,234
  • Joined: 29 Aug 2017
  • Loc: In a valley, in the UK.

Posted 14 August 2020 - 05:44 AM

I think the SvBony ended up in jail.

Jailbait! lol.gif



#44 BillP

BillP

    ISS

  • *****
  • Posts: 20,457
  • Joined: 26 Nov 2006
  • Loc: Spotsylvania, VA

Posted 15 August 2020 - 05:42 PM

I don't think a 10mm makes sense.  Too close to the others.  Better to get something like this for lunar cruising.

 

https://www.eyepiece..._p/20102036.htm

 

Or you could be 1st on your block to try this 4mm...

 

https://www.eyepiece..._p/20101004.htm


Edited by BillP, 15 August 2020 - 05:55 PM.

  • esd726 likes this

#45 Shorty Barlow

Shorty Barlow

    Gemini

  • *****
  • Posts: 3,008
  • Joined: 15 Sep 2015
  • Loc: Lloegyr

Posted 15 August 2020 - 10:58 PM

Jailbait! lol.gif

https://www.youtube....h?v=iC6Cgb8nHwk

 

Jailbreak?



#46 Sweep

Sweep

    Sputnik

  • -----
  • Posts: 45
  • Joined: 20 Dec 2018

Posted 16 August 2020 - 01:31 AM

Masuyama 85-deg AFOV 10mm

 

 

Just to be contrarian wink.gif  

I”ll second this choice a wonderful eyepiece however if you need a a lot of eye relief may not be the best option.



#47 Jond105

Jond105

    Fly Me to the Moon

  • *****
  • Moderators
  • Posts: 5,499
  • Joined: 19 Feb 2018
  • Loc: Detroit

Posted 16 August 2020 - 01:34 AM

Truthfully, buy a cheap one to make sure you actually need the 10mm between the 13 and 8. Then go from there
  • esd726 and Tropobob like this

#48 esd726

esd726

    Apollo

  • *****
  • topic starter
  • Posts: 1,392
  • Joined: 30 Sep 2004
  • Loc: Rochester, IN

Posted 16 August 2020 - 06:36 AM

  I’m thinking I’m now pretty much set on not getting a 10.  I THINK lol.gif

If it would ever be nice enough at night, tonight MIGHT be, I could finally get out and see if I’m “ok” with 13-8.

Actually see if I’m ok with 24-13-8-5 (30 for WF) or rather have 17.5-14-8-5 (30) or even get a 20 100° and do a 20-13-8-5.

Maybe even try the 3.5 like Bill suggested.thinking1.gif

All this playing on paper is fun, but it’s starting to get frustrating and even more convoluted since I can’t get out  bangbang.gif

I really like and appreciate all the comments, they have been very informative. 

CN has really been a great resource for the 15+ yrs (geesh that long already shocked.gif ) I’ve been on here. 


Edited by esd726, 16 August 2020 - 10:58 AM.


#49 csrlice12

csrlice12

    ISS

  • *****
  • Posts: 26,914
  • Joined: 22 May 2012
  • Loc: Denver, CO

Posted 16 August 2020 - 10:15 AM

Well, at this point there's only one thing to do......buy a whole bunch of eyepieces, become your own eyepiece shop!


  • esd726 likes this

#50 esd726

esd726

    Apollo

  • *****
  • topic starter
  • Posts: 1,392
  • Joined: 30 Sep 2004
  • Loc: Rochester, IN

Posted 16 August 2020 - 10:57 AM

Well, at this point there's only one thing to do......buy a whole bunch of eyepieces, become your own eyepiece shop!

BOY...wouldn't THAT be fun!!!!!drool5.gif jump.gif snoopy2.gif ubetcha.gif whee.gif




CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.


Recent Topics






Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics