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William Optics - 103mm f/6.9 Pegasus Binoculars - FPL 53 APO

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#1 Chuck2

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Posted 14 January 2020 - 01:55 AM

Just spotted a new binoscope on the market and had not read about it on any forum. Thought the members would be interested in discussing a new entry to the binoscope market. I own a Vixen BT126, was considering an APM 120 ED/SD version, then I saw this, an interesting contender.

 

 

https://williamoptic...gasus-binocular


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#2 Mark9473

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Posted 14 January 2020 - 03:55 AM

Interesting product. The EMS mirrors are of course very well known, so the only open question is the mechanics, but it looks well made.

I couldn't find a spec on the IPD range or the maximum eyepiece fieldstop.

3.1° at 27x with a pair of Masuyama 26mm 84° eyepieces would be a nice view I'm sure, or 2.5° at 32x with 22T4 Naglers.


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#3 ihf

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Posted 14 January 2020 - 01:07 PM

It looks very nice and tempting. Two observations: Even though it looks slim, at 11kgs it is heavier than the APM120. Unfortunately this limits mount choices. It comes in a nice padded travel case. Not sure the dimensions, but the retracted length of the tubes is listed as 615mm, which I think makes it impossible to carry on. Maybe they should make a lighter more portable 70-90mm to widen the audience?


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#4 coopman

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Posted 14 January 2020 - 02:01 PM

Way out of my budget!

#5 Gavster

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Posted 28 January 2020 - 08:38 PM

I just received this binoscope today and had some clear skies so managed to give it an initial test. The build quality is fantastic, better than I expected, the focusers are not that far behind a feather touch.

The ems is a dream to use and very easy to collimation the scopes with the x and y knobs. Great views with my 24mm pans and plenty of in focus (I’m guessing the tubes have been shortened a fair bit compared to the mono 103). It’s a great fit with my Panther TTS mount.

I had a kowa highlander previously which I didn’t get on with but this wo Pegasus is very impressive - really looking forward to the next time (which might be a while away looking at the forecast)

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Edited by Gavster, 28 January 2020 - 08:40 PM.

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#6 Rich V.

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Posted 28 January 2020 - 09:05 PM

So nice on the eyes to look at and I hope you get years of great views through it as well.  It will certainly perform better than most prism-based short BTs when conditions allow pushing up the magnification.  Mount's not shabby either.   waytogo.gif

 

The finish sure looks like the fine Long Perng-made scopes/hardware of years ago.  I've lost track anymore; I wonder if these recent WOs are based on Long Perng tubes/hardware or have they changed over to KUO or another producer?  Whoever it is appears to be maintaining the WO tradition.  

 

Rich


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#7 ihf

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Posted 29 January 2020 - 12:14 AM

The bino looks very nice. Could you please verify dimensions and weight for us? Does it work well with 2 inch eyepieces? Also curious if it needs to be collimated each time and how long that takes.



#8 Gavster

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Posted 29 January 2020 - 03:38 AM

The bino looks very nice. Could you please verify dimensions and weight for us? Does it work well with 2 inch eyepieces? Also curious if it needs to be collimated each time and how long that takes.

Its 70cm long by 35cm wide. I haven’t weighed it but would say the indicated 11kg seemed about right - certainly I found it portable and not heavy to mount etc. In fact it seemed lighter than 11kg - I had to put the 4kg weights quite high up on my panther mount to balance it which indicates that it’s not heavy.

Not sure if it needs to be collimated each time but it only takes me 10 seconds to do that so no hassle anyway. I think I’d probably check it each time anyway given how quick it is to do.


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#9 Mr. Bill

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Posted 29 January 2020 - 12:46 PM

Nice looking rig.....beautiful machine work. Williams Optics continues to impress.

 

waytogo.gif



#10 garret

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Posted 29 January 2020 - 02:14 PM

Impressive.

F6.9/  710mm, 2" ep EMS mirrors.

 

30mm APM UFF eyepiece: 23.6x, 2 x 3.0 degree field, 4.3mm exit pupil size.

22mm Nagler: 32x, 2 x 2.5 degree field, 3.2mm exit pupil size.

The Morpheus 17.5mm should be perform really good in this F6.9 refractor (40x, 1.85 degree field, 2.5mm exit pupil size)

Contrast should be better then with erecting prism.

False pupils is something of the past?

If optics are ok, moon and planets should be amazing.

Available in three colors

#1 on my wish list.


Edited by garret, 30 January 2020 - 12:50 PM.


#11 oldmanrick

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Posted 29 January 2020 - 09:31 PM

I just received this binoscope today and had some clear skies so managed to give it an initial test. The build quality is fantastic, better than I expected, the focusers are not that far behind a feather touch.

The ems is a dream to use and very easy to collimation the scopes with the x and y knobs. Great views with my 24mm pans and plenty of in focus (I’m guessing the tubes have been shortened a fair bit compared to the mono 103). It’s a great fit with my Panther TTS mount.

I had a kowa highlander previously which I didn’t get on with but this wo Pegasus is very impressive - really looking forward to the next time (which might be a while away looking at the forecast)

Very nice looking outfit, eye candy for sure!

 

I expect the views through it will be as good as the outward appearance predicts.

 

Hoping the skys clear for you soon.  I want to read more in-depth reports about optics, mechanics, etc. during your continuing use of it.

 

Congrat's and enjoy!

 

Rick



#12 Bob4BVM

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Posted 29 January 2020 - 10:45 PM

Wow- nice piece of work there.

I have most of the parts now for my old 102mmF6 BT project.

Seeing this makes me want to get back out in the shop, even if it is cold & damp !

 

Keep us posted on how she performs

 

CS

Bob.



#13 PEterW

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Posted 30 January 2020 - 03:14 AM

What is likely to be the highest useful magnification with these running at f6.9?

Peter

#14 Gavster

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Posted 30 January 2020 - 09:51 AM

What is likely to be the highest useful magnification with these running at f6.9?

Peter

I’m hoping I can use 5mm eyepieces to give around 140x but would be very interested in others experiences with binoscopes (and particularly binoscopes with ems)



#15 bcarter1234

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Posted 30 January 2020 - 06:21 PM

Gavster,

 

My experience with binoscopes are of the homemade achromat variety so your mileage will vary. I think you will find on nights of good seeing 140X will be a very conservative estimate. You are in for a treat.

 

Of course "useful" is subjective but I've had the 127mm Mr Bill's Bino Box Redux up over 200X with a big ol grin on my face. The image was not perfect but it was useful to me.

 

Someone who knows a great deal more than me said lenses like mine are recommended to be used at magnifications up to about 80% of their diameter in mm, so about 102X. I regularly spend hours at 117X with a pair of $25 6mm Expanse clones and have no complaint.

 

Please keep us informed as you get to use them. Yours are the first store bought pair I've ever seen that I would consider buying.

 

In addition to what must be wonderful performance they are beautiful to look upon. Aesthetically, my stuff lies somewhere closer to the other end of the scale. They remind me of a guy from my home town when I was a kid. He kept the hood of his car sparking clean and waxed to perfection. That was the only part he could see when he was driving it so why worry about rest?

 

Take care,

Brent   


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#16 Gavster

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Posted 17 April 2020 - 04:48 PM

Quick update on this. In a word - brilliant. I love scanning the skies with my 24mm pans. The stars are just so tight and beautiful. I really enjoy just letting my eyes relax and gradually I see more and more of the fainter ones. I’m thinking of getting some 30mm apm uff for it to get a 3 degree fov. Collimation is super simple to get perfect. Very recommended and Panther TTS-160 mount suits them perfectly.



#17 Rich V.

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Posted 17 April 2020 - 06:01 PM

Good to hear you're loving it; agree that the 30mm UFF would be a killer combo.    waytogo.gif

 

Rich



#18 Gavster

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Posted 12 November 2020 - 09:39 AM

Although I really enjoy the views through my Pegasus Binoscope, recently I've either been using my grab and go refractors for quick and easy observing or my C11 or 16 inch dob for more serious sessions. Since the WO binoscope is not grab and go (requiring my Panther TTS-160 mount) and also has relatively small aperture, I haven't had a proper outing with it since April. Weather conditions have been poor in the UK for the last month or so, but the forecast the other night was for clear skies from 2am, and with Orion nicely visible at that time from my London back garden, I decided it was about time to dust off the binoscope for a proper large nebulae session.

I've also acquired 2x 67mm televue nv plossl adapters so it was a good opportunity to test these out for binoscope usage. With the 67mm, the setup has a nice fast f2.6 effective speed, 11x mag and 3.5 degrees fov, perfect for those famous large nebulae that grace the sky at this time of year. Due to the severe light pollution in my back garden (sqm 18.6 as measured), I use a very narrow 3nm chroma ha filter with each monocular.

According to specialist nv binocular users I commit a cardinal sin by using very mismatched monoculars, in the left I use a Photonis 4G PVS-14 (actually gen 2 tech but top end) and in the right a Harder gen 3 PVS-14. The harder tube has nearly double the luminance gain of the photonis (the key drawback of gen 2 tech) but also has a materially higher sn. Having the monoculars side by side its extremely easy to do direct comparisons of the different tubes by switching from one to the other in mono mode. The lower gain coupled with the narrow 3nm ha filter resulted in the photonis being obviously visibly less good, the nebulae fine detail was noticeably less clear and distinct compared to the Harder. However, the brain is a fantastic thing and in bino mode even with the drawbacks of the Photonis tube, the views were a big jump better than the Harder mono mode (again easy to see, just by switching the photonis tube off and on!). I mentioned in my previous thread a number of advantages of bino nv observing, but the key one apparent to me was just how clear fine detail was in the nebulae compared to the mono mode. The brain really does some awesome stuff. I've decided that the next time I visit a dark site, I will be taking my binoscope with me - I've only used it in LP London and am itching to see the results at a dark site.

The nebulae views I was getting were the best I've had from London (the 67mm televue eyepieces making a difference here also, working really well albeit with some vignetting due to the ~38mm image circle of the binoscope. The vignetting wasn't a particular issue for me as the vast majority of the fov wasn't impacted visually.

M42 was the obvious first port of call given Orion was blazing bright in the southern sky and the full extent of the extended nebulosity was clearly visible. Then onto the horsehead and flame which were bright and the horsehead had a nice shape even at this low magnification. But the first wow moment really was the Rosette in which lots of intricate detail was visible which isn't the case usually from London. The bino mode really "smoothed" out the nebulosity and the fainter bits became much clearer, but it was the sheer fine detail shown that blew me away given the observing conditions. The fox fur nebula and cone were easy to see, something that hasn't happened for me from London before. The wide band of Barnard's Loop was very contrasty.

Then I scanned around enjoying all the other nebulae highlights including seagull, monkeyhead, lowers (very nice when often it disappoints me at a LP site), monkeyhead (that's a bright one!), jellyfish, sharpless 254/255/257 (a bit small but all three clearly visible, first time I've observed these from home, I stumbled upon these by accident in Gran Canaria in a 16 inch dob in February), spider and fly nebula, and flaming star.

To finish off a very enjoyable session, I scanned over to the California which provided another "wow" moment, the top and bottom bands were very distinct but also the fine nebulae detail within was fantastic. I did a quick comparison with mono mode and this object unambiguously showed how much of a difference two eyes makes on nv nebulae observing. A similar thing happened on the final objects of the night, the heart and soul, looking much like the views and phone images I have taken from dark (21+ sqm) sites, wonderful.

Now I must getting planning that dark sky trip for the next new moon...


Edited by Gavster, 12 November 2020 - 09:43 AM.

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#19 Gavster

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Posted 22 November 2020 - 03:03 PM

According to William Optics only 6 of these Pegasus Binoscopes got made and the z103 tubes that they use are now discontinued. I think that’s a shame and I hope William optics offer something similar in the future. I think it’s a great product but I guess binoscopes are quite a niche item.

#20 PEterW

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Posted 22 November 2020 - 03:38 PM

Sad indeed, especially as they have 2” focussers giving more options for eyepieces....

Peter

#21 edwincjones

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Posted 22 November 2020 - 04:39 PM

According to William Optics only 6 of these Pegasus Binoscopes got made and the z103 tubes that they use are now discontinued. I think that’s a shame and I hope William optics offer something similar in the future. I think it’s a great product but I guess binoscopes are quite a niche item.

they do make a 132 and a 156mm refractor that could ? be attached to the EMSs

 

question.gif

 

but I am just not seeing the niche

 

edj


Edited by edwincjones, 22 November 2020 - 04:42 PM.


#22 ihf

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Posted 22 November 2020 - 11:13 PM

question.gif

 

but I am just not seeing the niche

To me the niche is 2 inch eyepieces, hence wide fields, large pupils. Why support 2 inch if the z103 is f6.9 and probably mostly suitable to observe planets? Unfortunately this bino is too long for easy transport, and the weight overloads the Manfrotto N12 head. Keep the 2 inch eyepieces, make it short and airline friendly, make sure inexpensive/compact heads like the N12 is usable. I would find the WO 73mm or even 81mm f5.9 more attractive. Or maybe the AT92 f5.5 is small/lightweight enough? Maybe the RedCat at f4.9 can be scaled up a little from 51mm?


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#23 Chuck2

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Posted 23 November 2020 - 02:30 AM

Gavster,

 

It was almost a year ago that I spotted the new Pegasus binos, became very interested, but never "pulled the trigger". I'm glad I posted them here last January and you decided to own such a magnificent bino. 

 

In the mean time I stuck with my proven Vixen BT126, they have given me years of wonderful views. Although not ED glass like yours, at 28x and 45x, they do provide amazing views of M42 Orion, Double Cluster, M8 Lagoon and the thousands of pinpoint stars scanning Sagittarius.

 


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#24 Binomania.it

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Posted 23 November 2020 - 04:08 AM

Hi from Italy!
At the Binomania " headquarters", a specimen of the Pegasus will arrive as soon as possible. The Italian distributor  of W.O (UnitronItalia)  has confirmed to me that production will restart. I will have the possibility to compare it vs an  Oberwerk 100 SD and an APM 100 SD and in high resolution with a Takahashi FS128 +  baader binoviewer. If you would like me to do other tests, let me know, so I can organize myself with my collaborators. I thing to creat also a video-review on my YouTube channel with english subtitles...

Clear Skies to all.

Piergiovanni - Binomania.it


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#25 Chuck2

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Posted 23 November 2020 - 08:46 PM

Hi from Italy!
At the Binomania " headquarters", a specimen of the Pegasus will arrive as soon as possible. The Italian distributor  of W.O (UnitronItalia)  has confirmed to me that production will restart. I will have the possibility to compare it vs an  Oberwerk 100 SD and an APM 100 SD and in high resolution with a Takahashi FS128 +  baader binoviewer. If you would like me to do other tests, let me know, so I can organize myself with my collaborators. I thing to creat also a video-review on my YouTube channel with english subtitles...

Clear Skies to all.

Piergiovanni - Binomania.it

Piergiovanni,

I'm looking forward to your upcoming review of the Pegasus binos. I have been a long time follower of Binomania.it and enjoy the thorough reviews and feedback you provide on binoculars.  Years ago, your extensive review and ongoing member discussion on the Vixen BT126 led me to a purchase.  With the growth of big binoculars, it's great to read different perspectives and opinions on Oberwerk, APM, IBIS, Kowa, Swaro and many other brands.

Thank you!




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