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Review: Sky-Watcher Pro 120ED

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#1 Olivier Biot

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Posted 26 March 2012 - 04:22 PM

Review: Sky-Watcher Pro 120ED

By Joe Renzetti.

#2 bob midiri

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Posted 27 March 2012 - 07:10 AM

Nice review Joe. I own its little brother the SW EDpro 100mm. Fine compact scope. bob

#3 coopman



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Posted 27 March 2012 - 08:34 PM

Thanks for the nice review Joe. There has been a lot of buzz here on CN about the Orion EON 120ED, but very little comment about this scope.

#4 Alvan Clark

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Posted 28 March 2012 - 02:25 PM

I think the EON is cuter. I see definite color around bright white stars with mine. However I paid about $1200 and for that price I am incredibly happy with it and would recommend it. Love the case too, it fits perfectly in my small car trunk.

Never tried the eyepieces that came with it though.

#5 Loden


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Posted 28 March 2012 - 11:10 PM

Thanks Joe. I just got the scope from Amazon, the last one they had, and amazingly for about $1,300. It is a delight to use and has everything one needs to drop it on a mount and start looking. Even though my back yard is about 60% tree obstructed, I was able to see some great views of the little fuzzies and a truly impressive, detailed view of M67.

#6 Bill Barlow

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Posted 15 April 2012 - 12:27 PM

Does anyone know if the dew shield on this scope is retractable or is it fixed?


#7 BKBrown



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Posted 15 April 2012 - 03:07 PM

It's fixed, just like the SW100ED f/9 and 80mm ED Pro models.

Clear Skies,

#8 aa6ww



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Posted 15 July 2014 - 01:27 AM

Could anyone elaborate on this comment made about the glass on this scope from this article:

"The optics are made with a Schott glass positive front Crown element and a second lens element fabricated of fluorite."

I've never seen anyone mention anything about a fluorite element before on this OTA.

Also, is this basically the same OTA ( 114mm Outside diameter) as the Celestron OMNI 120 but in a shorter tube with better optics.


#9 2244champ


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Posted 15 July 2014 - 01:49 AM

If you read the description of this telescope at OPT, it does say Schott & fluorite. Doug

#10 PhilH


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Posted 15 July 2014 - 03:51 AM

I reviewed this scope in the June 2014 issue of Astronomy, so you might take a look at that if you have it.

All three instruments in Sky-Watcher's ProED Doublet APO Refractors use the same two-element objective design. Each front Crown element is made of Schott BK-7 glass, while the back Flint element is FPL-53, two of the most advanced extra-low dispersion glasses available. Both have state-of-the-art optical multicoatings.

Overall, I found that the Sky-Watcher 120 ProED Doublet APO refractor is a solid performer. Images were sharp and contrasty with no appreciable secondary chromatic aberration evident. My only complaints, and they were minor, were finder placement and a somewhat rough focuser.
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#11 aa6ww



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Posted 27 July 2014 - 12:07 AM

Hi Phil, your reviews are always informative. I enjoy reading them. I just both one of the Sky-Watcher Pro 120ED's and think its a perfect size of aperture vs physical size vs cost vs optical quality. I did replace the focuser with a William Optics 10:1 Crayford focuser for Synta refractors which fits beautifully and compliments the scope in appearance and function. I also don't like finder scope so far back that they get in the way of the main eyepiece. I'll be mounting one further up the tube with an additional tube ring, probably my Stellarvue 50mm RA finder, so I can use my 1.25" eyepieces.
I wanted something larger than my TSA-102, and something smaller than my T0A-130 that would match my Vixen GP-DX mount. The scope performs beautifully for casual back yard observing and also for taking out to a dark site, which I did last night. I just sold my TSA-102 because of this scope, and will probably be putting my TOA up for sale also, so I can get a nice 6" refractor now.


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#12 audioaficionado


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Posted 21 April 2016 - 10:25 PM

I'm four years late, but thanx for this informative review. Looks like you can have your cake and eat it with this scope. We don't need a heavy mount like the much heavier triplets of similar size and quality.

#13 Paul Rini

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Posted 09 November 2017 - 01:21 PM

Hello Everyone; I purchased the SW 120mm ED and it was great but it seemed the diffraction rings were only well pronounced on one side of the focus. Usually, refractors from overseas come with their lens retainer rings tight mainly for shipping. Working on this I decided to take out the lens to let it breathe. During this operation I noticed the rubber lens spacer didn't look symmetrical. Leaving this out of the lens system it seemed like it decompressed and then I reinstalled the ED lens assembly. This seemed to bring all the diffractions into perfect structure especially on both sides of the focus. The scope worked great right out of its case but after adjusting the rubber lens spacer (decompression seemed to expand this ring and thus changing the air space distance) and leaving the lens retainer ring loose after lens insertion the images were even better. Fantastic images. Clear skies, Paul

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#14 Edwin


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Posted 10 November 2017 - 02:19 AM

Thanks for this review, seems like a nice grab-and-go setup. Can you give additional comment on its performance on the AT Voyager, because it seems quite a (long and heavy) load fo it. What about damping times?

#15 Paul Rini

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Posted 14 November 2017 - 02:05 PM

I have my ED 120mm on an Orion Sky View Pro and this EQ mounts holds the OTA very well with less than 2 seconds damping down time. Both are lightweight and out the door as one unit. Coll down time is also very short.

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