Stellarvue Doublet Apo SVX127D

There is outstanding optical quality and service from Stellarvue. I am very impressed with this telescope. The finest workmanship is evident in all aspects. Optically I can't image any better for 127mm.

Vic offered me this scope at a discount because the tube had a blemish. For the life of me, I can't find any flaw. It's beautiful. The packing was wonderful. The first time I had it out was at a mini public viewing on the 10th tee at the Duke Univ golf course in Durham, NC. Not a dark sky at all, but the Washington Hotel gives the club a gratuity for being there. Looking at Saturn, I commented to the other two guys, who were both using Schmidts (an 8' and a 10"), that the seeing had improved markedly and they both agreed. Looking through each of them, their images were soft (to me) and they thought they had pretty good views. There was no comparison with what I had. Thanks, Vic. My only gripe, and it's a very small one, is I wish the carry handle had a finder bracket built in like the Wiliam Optics handle does. The SKB case with the upgraded foam was worth the additional expense. The scope nestles firmly in its place. I'm pleased with my entire experience buying through Stellarvue.

I am very pleased with this telescope. It is very solidly built and provides tack sharp lunar images (which I use the telescope for the most). I am mostly a visual observer, but the SVX127D works great for taking sharp lunar images. The SVX127D is highly recommended. Thanks SV.

Received an SVX 127D this week. Unboxed telescope and accessories that purchased at the same time. I found the telescope in good order after shippment, shipment also arrived sooner than I expected. Carefully examined telescope for fit and finish I found the scope to be flawless and focuser very smooth. Awaiting several accessories before using the scope on the night sky. I'm glad I found Stellarvue and such a high-quality telescope. With some parts made in the US and a lens that was figured in states also. A rare find these days.

Extremely high quality product many years of great views . And this will be passed on to grandchildren as inheritance . That good !!!

After owning a APM 140, and then going to an 8” Edge, I wanted a refractor again and was considering a 130 triplet, then Stellarvue announced they were going to produce 5” doublets. It arrived in the heavy duty case that was double boxed with a huge air gap all the way round. The packaging protected the scope - travelling across the pacific to NZ. I ordered it with the feather touch focuser because I always wanted to at least have one on a scope. It is lighter in action, than the 3.7 R&P focusers I was used to but it never slips. I cannot think of any flaws this scope has. The tube is solid, the extension piece which is removable for binoing, was machined so well and aligned accurately with a fine thread, that when I wanted to remove it, I found it hard to see where it came apart. I don’t suffer much from cool down time, as the scope is in an insulated shed and outside is usually 2-3 degrees C different, I am 99% visual. I had the 127D at the same time I had the 8” Edge, and comparing them against each other, stars looked better in the refractor due to contrast, and looking at nebula, I don’t think I was loosing much in performance. My sky is generally not able to put out what the 127D can do, as I hardly ever have perfect seeing and always a lot of moisture in the air. The scope will always put out the best it can - on any given night. So you never have to doubt the scope is performing….….if the view is not great its the sky thats the issue. This scope is a keeper.

I am extremely pleased with the optical quality of this scope. Also, the mechanical build of the OTA is top notch. The Stellarvue focuser is a solid performer. The 5” aperture puts up beautiful views of the planets. Definitely 5 stars. Thank you SV

The telescope arrived months earlier than projected. I am still waiting for the weather to clear so it has not seen "first light" yet. It appears to be very well made.

Outstanding optical quality! Bench test interferometry from Stellarvue showed a Strehl of 0.99. I ran a WinRoddier software analysis of the scope with a high-speed video camera under live-sky. The scope was not force-cooled to ambient temp yet and was tested in less than ideal atmospheric conditions. Despite the conditions I got 0.98 Strehl in the Green (visual) wavelengths. So the 0.99 Strehl factory Zygo test in a controlled lab bench environment appears to be legitimate for sure on this scope. I got a polychromatic Strehl (full color all throughout the Red, Green, and Blue wavelengths) of 0.97. This indicates very tight control of any Chromatic Aberration or Spherical Abberation all through the visible light spectrum. I checked Rigel, Betelgeuse and Sirius visually for any defocused or at-focus ghost color fringing and could not detect any on these very bright stars. This is the first doublet I've tested of several brands and models of doublets that I've ever seen that result from. I put the optical tube through a variety of other tests: In and Out-focused diffraction rings from near-focus out to 18-20 waves of defocus were essentially perfect and on a par with other premium brands of refractors I've tested previously that were triplets, not doublets! The Feathertouch 3" focuser was mechanically and aesthetically perfect with virually zero lateral drawtube shift or focuser collimation drift when checked with lasers and a magnified test pattern to see errors easier. When checked with a Takahashi Collimator Scope, the lens set test pattern views showed perfect collimation all the way front to back to the focuser drawtube and focal point. I've owned and tested several other brands of premium triplet apo refractors. This is the first time I've seen a doublet lens set that could compare to those high-end triplets, but this one really does. And with this tube being about 4 lbs lighter than similar 5 inch scopes that have heavier triplet lens cells, the easier portability is especially appreciated out in the field on remote setups or with lighter mounts. Another unique feature that is very seldom seen is the fact that Vic is willing to back up the scope's claimed performance with an interferometry bench test printout provided to each scope's owner. That is a pretty uncommon thing to see in the industry. The premium companies will do that for you, but typically you'll pay several hundred bucks extra to get that information. It is included automatically with these Stellarvue "X" models without you having to make a special request and pay extra money for it. Eventually I'll post more complete optical test data with graphs and pics to my website once I have more time to compile it all (compubuild.com/astro). But this SVX127D refractor really stands out to me as "best-in-class" of any doublet I've ever seen including some older premium models of Flourite-lens doublets that were considered the best of their time. What truly stands out about this scope though is how well it compares to premium TRIPLET apo's. That's something I didn't expect and makes this model something really special. Thanks, Wade