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

CN Report: First Look - 8mm Ethos

This topic has been archived. This means that you cannot reply to this topic.
18 replies to this topic

#1 Tom T

Tom T

    A Father, A Teacher, A Pioneer

  • *****
  • In Memoriam
  • topic starter
  • Posts: 36,397
  • Joined: 26 Feb 2002

Posted 02 July 2008 - 09:50 AM

Link

#2 ilovecomets

ilovecomets

    Vanguard

  • *****
  • Posts: 2,184
  • Joined: 21 Aug 2006

Posted 02 July 2008 - 10:18 AM

Great article Tom. I agree with your review of the Ethos. I did find the 8mm to be just a tad shorter eye relief than the 13. I've noticed that on the 8E my eyelashes hit the front lens when I take in the whole field and on the 13E they don't. As for barlows, I prefer to not use them because of the added weight, but they both barlow well. Can't wait for another one next year.

Sean

#3 Larry Geary

Larry Geary

    Vanguard

  • *****
  • Posts: 2,402
  • Joined: 24 Sep 2006

Posted 02 July 2008 - 10:21 AM

I predict 5mm and 20mm Ethos at next year's NEAF.

#4 ryderc1

ryderc1

    Viking 1

  • *****
  • Posts: 610
  • Joined: 15 Apr 2006

Posted 02 July 2008 - 10:49 AM

Very informative and well done (as usual) report, Tom. And the photo is the best one I've seen in terms of getting a good feel for the size difference between the 8 and 13.

I have a 13 Ethos and love it. Looks like an 8 will be joining it soon!

Charlie

#5 turtle86

turtle86

    Mr. Coffee

  • *****
  • Posts: 5,867
  • Joined: 09 Oct 2006

Posted 02 July 2008 - 11:54 AM

Great report. I liked your reference to Roger Clark's book. Since reading it, I have endeavored to use higher magnifications when observing deep-sky objects. The 100-degree FOV of the Ethos definitely enhances observing with a higher mag.

I ordered the 8mm Ethos because I liked my 13mm Ethos so much. Naturally it has rained here in Florida every day since its arrival. Very frustrating! Still, it's reassuring to read that I'll *someday* be treated to some great views of M13 and M57 in my 18" scope--if it ever stops raining here. :bawling:

#6 DeepSpaceTour

DeepSpaceTour

    Gemini

  • *****
  • Posts: 3,164
  • Joined: 25 Oct 2005

Posted 02 July 2008 - 12:41 PM

Nice report Tom,I had the 8MM out for it's maiden voyage last night-this morning,at a dark sky site, for an all nighter,I agree with your results,I found as M-51 moved to a very dark part of the sky(over lake Huron)the 8E really showed it's stuff on these two incredible galaxies,they just popped with detail.

Clear skies.

#7 ZachK

ZachK

    Viking 1

  • -----
  • Posts: 840
  • Joined: 20 Aug 2005

Posted 03 July 2008 - 03:04 AM

Thanks for the review, I am planning a light astro kit around an 8mm Ethos and a 66mm Apo scope. I figure it will give me amazing views and still be small enough to put in a backpack and take to my observing site on the bus.

#8 RRaubach

RRaubach

    AstroCowboy

  • *****
  • Posts: 2,173
  • Joined: 26 Jan 2005

Posted 03 July 2008 - 07:12 PM

A nice report, Tom. I may decide to spring for one of them, especially the 13 mm.

Eyepiece junkie in Wyoming :FarmerRon:

#9 DavidM

DavidM

    Surveyor 1

  • -----
  • Posts: 1,677
  • Joined: 25 Mar 2006

Posted 04 July 2008 - 12:43 AM

Thanks for the review Tom. For me the great thing about the wide FOV in the 8E is that with a large target you can zoom in and examine detail while still retaining some perspective of the object on a larger scale, even though you are too close in to actually frame it. For this reason I really enjoyed roaming around the Eta Carina nebula last night with a 16" Lightbridge, though I can't reach focus in 2" mode without an extension tube.

#10 HAC

HAC

    Viking 1

  • -----
  • Posts: 534
  • Joined: 07 Apr 2005

Posted 05 July 2008 - 12:16 PM

That was fast.

#11 Chris Schroeder

Chris Schroeder

    Cosmos

  • *****
  • Posts: 8,515
  • Joined: 11 Dec 2004

Posted 06 July 2008 - 01:07 PM

Well done T, thanks for the report:goodjob:

#12 Mr. Bill

Mr. Bill

    Cosmos

  • *****
  • Posts: 9,823
  • Joined: 09 Feb 2005

Posted 06 July 2008 - 03:53 PM

Well, there go the 10.5mm and 7mm Pentax XLs on the block....

The new lineup....26 Nagler, 17 Nagler ('cause its parfocal with the 26), 13 Ethos, 8 Ethos.

What else do you need? (rhetorical question)

;)

#13 Starman1

Starman1

    Vendor (EyepiecesEtc.com)

  • *****
  • Vendors
  • Posts: 50,386
  • Joined: 23 Jun 2003

Posted 06 July 2008 - 04:44 PM

Tom,
One clarification:
The focal plane setting of 0.27" below the shoulder is very close to the 0.25" below the shoulder of the Nagler Type 6s, so the Paracorr setting with the supplied adapter is Setting 4.
If used as a 2", without the adapter, however, the best setting is Setting 1, with the Paracorr Tunable top all the way pulled out. Indeed, the perfect setting is 1.46mm farther out that that, but such a small distance is not worth fussing with.
Setting 5, though, is 14.16mm away from the proper setting.
I suspect your mind got the Paracorr settings reversed (a lot of people do that) and you said setting 5 when you meant "all the way out", which is really setting 1.

#14 Jeff Morgan

Jeff Morgan

    Voyager 1

  • *****
  • Posts: 12,976
  • Joined: 28 Sep 2003

Posted 07 July 2008 - 12:49 PM

What else do you need? (rhetorical question)

;)


I guess that depends upon what else TeleVue comes up with :grin:

#15 Tom T

Tom T

    A Father, A Teacher, A Pioneer

  • *****
  • In Memoriam
  • topic starter
  • Posts: 36,397
  • Joined: 26 Feb 2002

Posted 07 July 2008 - 04:10 PM

Hi Don,

You are correct. It should read with the paracorr all the way out. Thank you for pointing that out.

Thanks for the comments gents.

T

#16 Daniel Mounsey

Daniel Mounsey

    Vendor (Woodland Hills)

  • *****
  • Vendors
  • Posts: 8,035
  • Joined: 12 Jun 2002

Posted 17 July 2008 - 10:03 PM

Correct me if I'm wrong Tom, but I didn't see any comments regarding how the Ethos compared to the TV 8 plossl depicted in the photo on any target, particularly a bright star or planet.

#17 Tom T

Tom T

    A Father, A Teacher, A Pioneer

  • *****
  • In Memoriam
  • topic starter
  • Posts: 36,397
  • Joined: 26 Feb 2002

Posted 17 July 2008 - 10:09 PM

Nope. That's why it's a first look. :)

(In the words of the Guvner - "I'll be back!")

T

#18 Daniel Mounsey

Daniel Mounsey

    Vendor (Woodland Hills)

  • *****
  • Vendors
  • Posts: 8,035
  • Joined: 12 Jun 2002

Posted 17 July 2008 - 10:33 PM

Cool!

#19 kfred

kfred

    Vanguard

  • *****
  • Posts: 2,164
  • Joined: 11 Nov 2003

Posted 17 July 2008 - 10:54 PM

Now that we have the 13mm and 8mm Ethos, and thoughts on what the next Ethos size might be?

Fred


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