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Best eyepieces for bino'd deepsky

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#1 chrisg

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Posted 03 April 2013 - 12:18 PM

Simple question - what are your favorite, go-to eyepieces when observing deepsky objects with your binoviewer? Why?

#2 Mark9473

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Posted 03 April 2013 - 12:31 PM

Mine are a pair of Circle-T 25mm volcano top Erfles that give excellent performance without any flaws that I can see, and give the maximum FOV my MaxBright binoviewer is capable of.

#3 denis0007dl

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Posted 03 April 2013 - 02:02 PM

This is VERY simple:

"Best eyepieces for bino'd deepsky"----EDMUND RKE 28mm---clear winner of all!!!!!!!

#4 BBryce

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Posted 04 April 2013 - 01:14 AM

A pair of Vixen NPL 30mm, I love them with my Maxbright. Lightweight, sharp, views of the moon and deep sky are marvelous, and most of all no vignetting.

Best bang for the buck !

#5 Messyone

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Posted 04 April 2013 - 03:40 AM

+1 on the 30 NPL's. Globs and Nebs look great in my WO's. Just bought pairs of 20 15 10 Agena SWA's and the 12mm WA too....feeling spoilt for choice.
Matt

#6 rodnocjolly

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Posted 04 April 2013 - 05:00 PM

two Televue Panoptic 24mm and a Maxbright Binoviewer
two Pentax XW 10mm (those are little more tricky to be collimated)

#7 Arizona-Ken

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Posted 06 April 2013 - 02:07 PM

XW20s with an EarthWin bino outfitted with a power switch on a CPC1100.

Outstanding clean, clear eyepieces and the power switch gives me very useful mags (81X, 168X, 280X). Often the only eyepiece set I use all night.

A close second are the Pan 24s which give 68X, 140X, and 234X. They slightly vignette at 68X.

Did the Herschel 400 with these eyepiece setups. Piece 'o cake and wonderful views. Have gone to mag 13 DSOs under Arizona skies.

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#8 Mike B

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Posted 16 April 2013 - 02:58 PM

They slightly vignette at 68X.

Yes, the 24mm Pans i used (for a few years!) in my Denk were splendid for views, but they *did* vignette in the lowest-power, widest-field config.

Replaced them with pairs of Vixen LVW's at 22mm & 17mm, and have never looked back! They seem a perfect match for the Denk's optical train!

In addition to the above, they seem a bit more neutral of tone to my eye, compared to the Pans. Plus they have gobs of ER... VERY eyeglass friendly, unlike the Pans. Their views are sharp edge-to-edge, and even for all their glass, they consistently show faint stars, galaxies, & subtle detail in everything they're pointed at.

I wouldn't exactly turn down a *free* pair of 20mm Pentax or 17mm Delos, but until that occurs, i'm exceedingly thrilled with my LVW pairs! :jump:

#9 denis0007dl

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Posted 16 April 2013 - 03:28 PM

They slightly vignette at 68X.

Yes, the 24mm Pans i used (for a few years!) in my Denk were splendid for views, but they *did* vignette in the lowest-power, widest-field config.

Replaced them with pairs of Vixen LVW's at 22mm & 17mm, and have never looked back! They seem a perfect match for the Denk's optical train!

In addition to the above, they seem a bit more neutral of tone to my eye, compared to the Pans. Plus they have gobs of ER... VERY eyeglass friendly, unlike the Pans. Their views are sharp edge-to-edge, and even for all their glass, they consistently show faint stars, galaxies, & subtle detail in everything they're pointed at.

I wouldn't exactly turn down a *free* pair of 20mm Pentax or 17mm Delos, but until that occurs, i'm exceedingly thrilled with my LVW pairs! :jump:



All LVWs are more than excellent eyepieces, I have 5mm and 13mm, but now I am selling them because I use just one pair of eyepieces on bino!

#10 chrisg

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Posted 23 April 2013 - 05:04 AM

Thanks for all the responses! Very interesting..hmm. Forgot to mention I'm using a 4.75" refractor so I'm somewhat aperture limited but will get an 9.25-11" SCT in the future.
I've been very tempted by the Denk14's as well as the LVW's, both 13 and 22, ES 24 68deg.

#11 Mark9473

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Posted 23 April 2013 - 07:25 AM

I'm using a 4.75" refractor so I'm somewhat aperture limited

In my experience you will soon miss the brightness of mono-viewing on DSO.

#12 Eddgie

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Posted 23 April 2013 - 07:36 AM

ES 24 68deg



This would not be a good investment.

The largest field stop that you can use with the Maxbrights before the field is cut off is about 23mm. Past this and the rear aperture of the binoviewer simply acts as a field stop.

This means that you wind up using your 24mm 68 degree AFOV eyepeice with the same apparent field as a 25mm Plossl.

What would be the point? Why not just buy the 25mm Plossls if you aren't going to get the 68 degree field of the 24mm?

Some of the people that responded my by using binoviewers with bigger prisms than the Maxbrights have, so they can still see most or all of the field of the 24mms.

A nice pair of eyepieces for the Maxbrights is the 20mm ES 68s. Even these will loose a tiny bit of apparent field, but you still have close to the 68 degrees of the eyepeice.

Another nice choice is the 19mm Pans.

But honestly, I would recommend a pair of 25mm Plossls. The binoviewer is going to dim the image a bit, and for seeing the faintest objects, you still want as large an exit pupil as you can get, and the 25mm Plossls will give you a brighter image than you will get from ES 20/68s.

But you will be throwing money away on the ES 24/68s.

#13 ManuelJ

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Posted 23 April 2013 - 08:09 AM

A pair of 25mm or so focal length orthos, like the 25mm ZAO I. No need for more FOV, but there is always need for more contrast!.

#14 chrisg

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Posted 23 April 2013 - 08:52 AM

re: 24mm ES68

I had a pair of 24mm Panoptics and as far as I could tell, I was getting the full 68 degree field and I believe I read one of the manuals for the Maxbrights, the 24 Pan is suggested as the widest one can go at that FL. I eventually sold the Pans to fund a mount upgrade, thinking I could get the comparable ES eyepieces for quite a bit less than another set of Pans.

#15 REC

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Posted 23 April 2013 - 08:57 AM

So this is a good thread as I just bought a new Denk11 BV to replace my WO BV. They have a 20mm 66* EO's with them, but will have include them with the WO when I sell it. I have a pair of 16mm and a pair of 26mm SP. Should I now just use the 26SP as my widest, brightes pair as my default set?

Don't want to spend any more $$ on EP's if the 26mm 52* are going to be fine?

Thanks....Bob

#16 Mark9473

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Posted 23 April 2013 - 09:14 AM

I had a pair of 24mm Panoptics and as far as I could tell, I was getting the full 68 degree field and I believe I read one of the manuals for the Maxbrights, the 24 Pan is suggested as the widest one can go at that FL.


The 24 Panoptic has a 27 mm field stop size - as wide as the 1.25" format allows, so that would mean you can just use any 1.25" eyepiece with the MaxBrights.
That definitely doesn't fit with my observation that I got definite edge of field clipping with a 32mm SuperPlossl.
I'm curious how this can be explained.

#17 chrisg

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Posted 23 April 2013 - 09:24 AM

Hmm! I could be wrong. Maybe there was field clipping but not enough to feel like I lost any immersiveness. I didn't do an A/B comparison at the time. Maybe I was looking at documentation for the Mark V?

#18 Eddgie

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Posted 23 April 2013 - 09:29 AM

Nope, sorry, you were not.

Edz has tried this and drift timed it.

He found that while he could not see vignetting, the system was working at about the same true field as would be provided by an eyepice with a field stop that was the same size as the rear aperture.

If you have another shorter focal lenght eyepice with a 68 degree apparent field (doesn't matter what power) try putting it in one barrel and using the 24mm in the other barrel and compare the difference. Not the true field.. Just look at the apparent field.

You will see that the eyepiece with the lower power will appear to give a bigger apparent field. Again, ignore the true field sizes.

This will show you that your 24mm eyepeieces are really only showing you less apparent field.

It is impossible to get a wider or full apprent field out of an eyepiece with a 27mm field stop when the rear aperture of the binoviewer is only 22.5mm.

This is what I observered when I did mine, and again, Edz measured it and determined that the Panoptics were indeed cut off in a smaller aperture bino.

#19 coutleef

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Posted 23 April 2013 - 04:00 PM

possibly 25mm sterling plossls would be a good choice. very low cost, excellent views and no vignetting.

#20 Eigen

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Posted 24 April 2013 - 02:41 PM

+1 on the NPL series. Been using a pair of 25s for a while now. I am very satisfied with the views.

#21 chrisg

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Posted 26 April 2013 - 10:10 PM

Thanks Eddgie - since your post, I've dug a little deeper and I'm starting to understand all these tradeoffs/issues with binoviewer design. Have you ever thought of either using Siebert's supercharge for your Maxbrights or just getting one of his BN25's? Seems to me like this could be a viable option. What do you think?






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