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Equipment Discussions >> Eyepieces

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gregory93
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Reged: 07/03/12

Any DSO killer-ortho?
      #6138678 - 10/15/13 09:57 AM

Hello again !
Since ES has still production issues regarding the short fls i thought that maybe i could use some orthos to do my job.I will mostly use them on DSO's and not that much in planets(never been my favorite). Has anyone tried any orthos on galaxies,pns,and globs?Especially at 6-7mm range?

Clear skies.


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csrlice12
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Reged: 05/22/12

Loc: Denver, CO
Re: Any DSO killer-ortho? new [Re: gregory93]
      #6138692 - 10/15/13 10:03 AM

Not in a dob I wouldn't....maybe in the ST80.....

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Jeff Morgan
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Reged: 09/28/03

Loc: Prescott, AZ
Re: Any DSO killer-ortho? new [Re: gregory93]
      #6138792 - 10/15/13 11:06 AM

Quote:

Hello again !
Since ES has still production issues regarding the short fls i thought that maybe i could use some orthos to do my job.I will mostly use them on DSO's and not that much in planets(never been my favorite). Has anyone tried any orthos on galaxies,pns,and globs?Especially at 6-7mm range?

Clear skies.




I have started using Astro-Physics SPL's on select DSO's - excellent results thus far, superior to Delos in many cases (I'm thinking of the Bug Nebula in particular). One must choose the DSO carefully though. Larger open clusters for example, not so good. On the restricted field I lose the context of the object, since my telescope has a fairly long focal length of 2800 mm. But the types you mentioned I think you will be pleasantly surprised if your scope has smooth motions - or tracking.


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gregory93
super member


Reged: 07/03/12

Re: Any DSO killer-ortho? new [Re: Jeff Morgan]
      #6138841 - 10/15/13 11:31 AM

Forgot to mention but i will be using them (if i get any) on a XT8". Mostly at faint galaxies and planetaries,since they are not that extensive objects.I do not have any experience with ortho,the smallest AFOV i have encountered is the AFOV of the 24mm Hyp Zoom and i do not have tracking.But got somehow smooth movements.

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aatt
sage


Reged: 07/26/12

Loc: CT
Re: Any DSO killer-ortho? new [Re: gregory93]
      #6138888 - 10/15/13 11:59 AM

I use my UO orthos on globs (12.5mm) and it is great for that, but some is invariably cut-off. I use the 9mm on planetaries or small globs sometimes. Can't complain, but I use mostly widefields on those objects as a rule.

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Tank
Carpal Tunnel
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Reged: 07/27/09

Loc: Stoney Creek, Ontario, CANADA
Re: Any DSO killer-ortho? new [Re: aatt]
      #6139041 - 10/15/13 01:14 PM

I find all simple glass Ortho/plossl/Mono to be great on DSOs however you do loose the FOV.
I find a Delos or XW works best for me yes not as much transmission but the presentation is wonderful with the large FOV.
Planetary I find is really where the orthos and simple glass shine!


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hfjacinto
I think he's got it!
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Reged: 01/12/09

Loc: Land of clouds and LP
Re: Any DSO killer-ortho? new [Re: Tank]
      #6139128 - 10/15/13 01:56 PM

I used TMB supermono's and if if looking for the clearest planetary nebula and planet eyepiece, that was it. As for Globulars, it was weird, the extra FOV of a widefield made the globular pop more. This was becuase I needed to use less power to fit it all in with a TMB, so if looking for a PN buster the TMB's are it, otherwise get a few widefields, they frame almost all other objects better.

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GeneT
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Reged: 11/07/08

Loc: South Texas
Re: Any DSO killer-ortho? new [Re: hfjacinto]
      #6139739 - 10/15/13 08:15 PM

Quote:

I used TMB supermono's and if if looking for the clearest planetary nebula and planet eyepiece, that was it. As for Globulars, it was weird, the extra FOV of a widefield made the globular pop more. This was becuase I needed to use less power to fit it all in with a TMB, so if looking for a PN buster the TMB's are it, otherwise get a few widefields, they frame almost all other objects better.




I use Ethos and Delos eyepieces for most of my viewing. More recently I have picked up some small glass eyepieces to see if I get a little better performance on planets and deep sky objects. I will need another six months to a year to firm up my conclusions. The small glass eyepieces I am testing include a 5 XO, a 7 TMB Super Mono, an 8 Brandon (planetary) and a 9 HuTech. Dim DSO's and stellar points are at the bottom of the list of objects I like to view. Two reasons are my interest, and the fact that I have to drive such a long distance to a good dark sky site. When I have a chance to do more observing comparing my big and small glass eyepieces, I will provide an update.


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ThreeD
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Reged: 12/23/08

Loc: Sacramento suburbs
Re: Any DSO killer-ortho? new [Re: gregory93]
      #6139770 - 10/15/13 08:34 PM

Quote:

Hello again !
Since ES has still production issues regarding the short fls i thought that maybe i could use some orthos to do my job.I will mostly use them on DSO's and not that much in planets(never been my favorite). Has anyone tried any orthos on galaxies,pns,and globs?Especially at 6-7mm range?

Clear skies.


I must say the difference in detail on the deer lick group between a 6mm Ethos and 6mm ZAO-II in Alvin's 22" F/4 was obvious. With my 16" F/4.5 my BGOs can give a minor improvement in detail over my Naglers. I believe the larger the scope the greater the difference.

http://faintfuzzies.com/AboutUs2.html


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BillP
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Reged: 11/26/06

Loc: Vienna, VA
Re: Any DSO killer-ortho? new [Re: ThreeD]
      #6139841 - 10/15/13 09:21 PM

Quote:

I believe the larger the scope the greater the difference [with better eyepieces].




This has certainly been my experience over the years of eyepiece shootouts.


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Jim Curry
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Reged: 10/29/07

Loc: STL
Re: Any DSO killer-ortho? new [Re: BillP]
      #6139946 - 10/15/13 10:35 PM

I've used my Pentax SMC ortho's to good advantage on dim galaxies, Brandon's, too. Of course the Brandon's are easily purchased as well.

Jim


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bremms
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Reged: 08/31/12

Loc: SC
Re: Any DSO killer-ortho? new [Re: Jim Curry]
      #6140023 - 10/15/13 11:14 PM

Most of the time I use a wide field eyepiece for DSO's. However, the 10.5mm RGO is great on globulars and Planetaries. Also use UO orthos, Parks gold (Masuyama), TV smoothies. The 11mm and 8.8mm ES 82's are very good though.

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azure1961p
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Reged: 01/17/09

Loc: USA
Re: Any DSO killer-ortho? new [Re: bremms]
      #6140034 - 10/15/13 11:21 PM

On planetary nebula and other objects that don't seem or feel cropped with a 43 degree field Orthos are fine. Something like the veil however would benefit with another kind of ocular design.


Peye


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azure1961p
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Reged: 01/17/09

Loc: USA
Re: Any DSO killer-ortho? new [Re: bremms]
      #6140035 - 10/15/13 11:21 PM

On planetary nebula and other objects that don't seem or feel cropped with a 43 degree field Orthos are fine. Something like the veil however would benefit with another kind of ocular design.


Pete


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azure1961p
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Reged: 01/17/09

Loc: USA
Re: Any DSO killer-ortho? new [Re: BillP]
      #6140045 - 10/15/13 11:29 PM

Quote:

Quote:

I believe the larger the scope the greater the difference [with better eyepieces].




This has certainly been my experience over the years of eyepiece shootouts.




I wonder if its mainly because larger scopes commonly use larger exit pupils where coma and such comes into play where the better more pricey oculars strut their stuff. Said anotherway if it were views at 35x per inch perhaps the benefits wouldn't be nearly as apparent.

Just floating a thought.

Pete


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russell23
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Reged: 05/31/09

Loc: Upstate NY
Re: Any DSO killer-ortho? new [Re: azure1961p]
      #6140355 - 10/16/13 07:16 AM

Not that they are easy to come by, but my 28mm Meade RG Ortho is very engaging as a DS eyepiece. There is something special about the combination of eye relief, presentation, flat field, and razor sharp field stop that comes together really nicely.

Dave


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BillP
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Reged: 11/26/06

Loc: Vienna, VA
Re: Any DSO killer-ortho? new [Re: gregory93]
      #6140387 - 10/16/13 08:02 AM

When I met the guy I sold my set of Pentax SMC Orthos to, I expected he wanted them for planetary observing. I came to find out that he was part of a group of big Dob owners that travelled to local dark sites and a DSO hunter. He explained to me that he and his buddies didn't care that the AFOV was small on these Pentax Orthos as what mattered is that their transmission and contrast was so good he said that they easily picked up more details and structure on faint galaxies and nebula. As example, here's a review that includes simulation of the difference about 1/2 way down - 12mm Tele Vue Radian & 12mm SMC Pentax XF.

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SteveC
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Reged: 06/15/06

Loc: Sunshine State & Ocean State
Re: Any DSO killer-ortho? new [Re: BillP]
      #6142013 - 10/16/13 10:56 PM

Quote:

When I met the guy I sold my set of Pentax SMC Orthos to, I expected he wanted them for planetary observing. I came to find out that he was part of a group of big Dob owners that travelled to local dark sites and a DSO hunter. He explained to me that he and his buddies didn't care that the AFOV was small on these Pentax Orthos as what mattered is that their transmission and contrast was so good he said that they easily picked up more details and structure on faint galaxies and nebula. As example, here's a review that includes simulation of the difference about 1/2 way down - 12mm Tele Vue Radian & 12mm SMC Pentax XF.




Wow, I owned the 8mm Radian, and was impressed with its light transmission. I can honestly say that I never witnessed such a dramatic difference as was shown in the Sombrero drawing when I compared it to other eyepieces. My opinions were based on observations of planets, moon, and globs.
Edit, maybe it was the 6mm I owned, still, I have the same impression.

Edited by SteveC (10/16/13 11:01 PM)


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JustaBoy
Carpal Tunnel


Reged: 06/19/12

Re: Any DSO killer-ortho? new [Re: SteveC]
      #6142039 - 10/16/13 11:13 PM

I've always thought that the Radians looked dim.
-Chuck


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Jeff Morgan
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Reged: 09/28/03

Loc: Prescott, AZ
Re: Any DSO killer-ortho? new [Re: JustaBoy]
      #6142105 - 10/17/13 12:09 AM

Quote:

I've always thought that the Radians looked dim.
-Chuck




I try not to make sell decisions rapidly, especially after selling the 17T4 Nagler.

But after the first outing with Brandons, I listed my Radians on Astromart within a couple of days.


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