Last night I had “first light” with the 12.5” f/6 mirror that you recently
supplied. It is truly a magnificent optic! Ronchi, knife-edge, and star tests
were straight out of a textbook, and the image of Saturn was breathtaking.
Despite the thin substrate, there is no hint of astigmatism. Frankly, when I
purchased a Hubble Optics mirror on xxxx, I was skeptical of the
advertised wavefront quality. For the low price, it just seemed too good to
be true. In the future, I will not hesitate to recommend your firm’s optics to
friends and acquaintances...
Contributing Editor, Sky & Telescope magazine (quoted by permission)
I’ve tried buying fast 8” mirrors twice through A-mart and both were dogs –
terribly undercorrected, probably spherical. This mirror is way different.
Stars are near pinpoints and there is no tendency to astigmatism (at least
nothing that didn’t come from my eyes). I went out tonight and looked at
Jupiter as soon as it became visible. Even so, it is getting pretty low in the
sky and the air was pretty wavy. As near as I could tell, in the moments of
stillness the images were as good as any scope I own.
Star testing showed even images that were very nearly the same inside
and outside of focus. Using my EZ tester (ronchi eyepiece) showed nice
straight lines and no hint of TDE.
As far as I can tell this mirror is a winner and will suit my needs very well.
Whether or not it actually meets the specs listed on the box I can’t tell
without getting it tested. But its a lot better than the other Ebay mirrors
and I like it. I wouldn’t be afraid to buy another Hubbleoptics mirror...
-Dave Chadsey (posted at http://www.cloudynights.com)
A real piece of art (14" lightweight sandwich mirror)...
I just tentatively assembled my 10" F4.7 1/17 PV wavefront mirror in my
observatory and watched Jupiter and the moon last night. Although the air
condition was terrible due to middle of rainy season, optical performance
was exactly as I expected! The surface of Jupiter was amazing. Contrast
of color was deep and details were very sharp, image edge was knife
cutting, even through hazy bad seeing. The surface of the moon had an
extra contrast; very very sharp edged landmark was attractive enough to
keep watching hours. A hair splitting and breath taking experience, which
reminded me of previous mirrors. I need to further tune up optical
performance of this scope such as replacing with smaller high precision
secondary mirror etc. Will report further progress.
Just wanted to let you know that I received the 14" mirror. AND, we tested
it today at my astronomy club. We used the computer program FigureXP,
and created a 7 zone mask for it. We used a very accurate Foucault
tester with a video camera. I must tell you that the mirror was better than I
expected… I am VERY happy with this purchase!
Excellent mirror (18"). Hubble Optics are great people to deal with...
Took a while for the mirror (14") to come in, but well worth the wait!
Totally dependable seller (20")
Some feedbacks on Hubble 5-star Artificial Star(s):
-Accurate description, useful item, recommended
-Smooth deal - perfect, as advertised merchandise
-Item as described (actually, even better), packed well, - thanks!
-Super Great Deal
-Great product,low price,fast delivery.
-EVERYTHING AS EXPECTED. THANKS FROM GREECE!
-Nice Star and great communication - recommended
-JUST WHAT I WANTED
-Great company! Great product!
-Achieved the best collimation I have had in a long time...
-This is exactly what I have been looking for...
-** Best seller of all! ** Thanks for advice about Item handling!! Thanks a lot!!
-Thank you very much about your new Star-item. It works very well. I am so happy.
Clear skies to you and may your summer days be warm and full of sales!
-Works a treat! Great Astro bargain. Highly recommended. Very Fast delivery!!!
-Great product. Great price. Very happy with the transaction.
-Great company to deal with, nice product!
-great product --- quick delivery AAA +++
-This little thing is fabulous value for the few dollars you are charging. I've been
contemplating various other types of artificial star gadgets, but, they all seemed
so expensive. This little guy is simplicity in itself, and does the job fabulously.
Extremely good value at the price you are selling it for.
-Super device! Well made! Great price! FAST shipping!
-Great product... AMAZING CUSTOMER SERVICE!!!! Highly Recommended!
-The best $20 astronomical investment I have ever made.
-My SCT was collimated better than it's ever been that night, and, I did the collimation
in broad daylight.
-Wow, it really works, even at 86 ft. I just have to keep direct sunlight off the
artificial star so there's enough contrast to see the "airy disc" and you're good to
go. I can't wait to see it against the stars tonight, my scope was pretty decently
(and quite noticeably) out of collimation. Now I feel it's pretty darn spot on.
-I first made sure the focuser was properly aligned. I then used a barlow laser to
make sure both secondary and primary were aligned. Then using the artificial star, I
tweaked the primary. I had to move two knobs each about 1/8th of a turn at most. I
then locked the mirror with the locking screws, and pointed up at polaris. It was pretty
darn spot on…
I measured the holes of both (units) using a scanning electron microscope at
work... The microscope can reliably measure down to less than 10 nanometers
(0.01 micrometers). Considering a single 50 micron laser drilled hole in stainless
steel disc (unmounted and no LEDs) can run $40-50 from commercial suppliers
here in the US, this is a fantastic bargain! Thanks very much.
-Your 5-Star Artificial Star is GREAT! I've never had an easier time collimating my SCT. Thanks
for a great product.
Great product, good price! I wish I had bought this sooner!!
I am wondering why I didn't get one of these long ago...
-My dad is very pleased with his birthday gift. Thanks.
-Great Little item! Collimation's a snap with this tool.
Simply put ,you exceeded by far my biggest hopes.
-Very, very, very great tool. Should have had it years ago. Excellent a+
It's the best astro tool that I ever bought... In my opinion, it looked much better than
a real star.
Every telescope user should have one.