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Hubble UL16 Premium Ultra Light Truss Dobsonian

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#1 hubble-optics

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Posted 20 October 2011 - 09:53 PM

Hubble UL16 Premium Ultra Light and Ultra Portable Truss Dobsonian System, at affordable price: $1995 Special Introduction Offer (The regular price is $2995)

Hubble UL16 Premium Dobsonian telescope is optimized to offer you high-quality, large-aperture telescopes designed in a very light and compact package for extreme portability. With a Hubble UL16, you are free to travel to your favorite dark-sky sites anywhere across the globe!

· A Premium, Light, Compact and Portable Design - About half the weight of traditional Dobsonian telescopes
· Outstanding Images - Premium quality, diffraction limited (with Strehl 0.95+) Newtonian optical systems will deliver stunning views of the heavens from dark sky sites
· Light, Strong, Compact and Extremely Portable - The Hubble UL16 features a precision-machined all-metal construction. Fully assembled the UL16 weighs at about 60 pounds. It has 8 rigid truss tubes and extremely strong and portable folding ALT bearing structure. It features a real mirror box for safe and convenient mirror protection, storage and transportation
· Exclusive Optical Technology - The UL16 features Hubble lightweight sandwich mirror with an optimized thermal design that cools up to 10 times faster than the regular solid mirrors
· Fast Optics - The UL16 fast f/4.5 optical system delivers bright images and features a short tube keeping the eyepiece conveniently close to the ground
· Semi-Enhanced Coating on the Primary Mirror - The most recommended (by professionals) 92% Semi-Enhanced Coating on the primary mirror and 96% Enhanced coating on the secondary mirror.
· Modular and Compact Design: The Hubble UL16 is delivered in several preassembled modules. The entire systems can be assembled easily and quickly, as little as a few minutes.

50% deposit at the order time, rest plus S&H before delivery. The delivery time is about 30 days.

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#2 hubble-optics

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Posted 20 October 2011 - 10:03 PM

Why would you select a Hubble UL16?
The UL16 is a perfect balance between a telescope with huge light-gathering capability and unbeatable portability. It will be the telescope that gets taken out of the garage or from the back of a car to be used frequently. It will provide stunning views of the heavens and a lifetime of observing enjoyment.

Hubble UL series has been designed to be as light and compact as possible, making the task of transport to your favorite dark-sky site as easy as possible. The heaviest component of the UL16 is the primary mirror, which weighs in at about 25 pounds, and the entire telescope is only about 60 pounds, which is remarkably light for a 16-inch telescope. In addition, with its fast focal ratio mirror, the Hubble UL16 telescope has an eyepiece location that can almost always be reached when you are standing with both feet on the ground (only 67" from the ground when the UL16 is pointed at zenith).

With the Hubble UL16, most NGC objects can be found from a dark sky site - they may not be too obvious, but you can chase them down. The Hubble UL16 will reveal the hints of color in bright emission nebula such as the Orion Nebula and some of the brighter planetary nebulae (The Blue Snowball, The Saturn Nebula and others), incredible detail on Jupiter and, using an H-beta filter, a very distinct Horsehead nebula. Results will vary according to observing conditions and other factors. The Hubble UL16 is a telescope that can provide a lifetime of satisfying observing experiences in a 60-pound package!

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#3 hubble-optics

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Posted 20 October 2011 - 10:14 PM

Features of the UL16:

Exclusive Sandwich Mirror Technology:
Our sandwich mirror technology has been used to manufacture research-grade optical elements and proven by over a half dozen years of successful applications at research facilities such as NASA, California State Polytechnic University San Luis Obispo, for the US Army, and in amateur telescopes around the world. Hubble sandwich mirror’s open core and close back design not only allows air to circulate through the mirror, but also provide the maximum structure strength to allow a simpler mirror cell design. Our sandwich mirror will reach thermal equilibrium up to 10 times faster than a traditional solid 16-inch mirror and means the mirror can deliver great views even as the air around the telescope is changing temperature.

Why is thermal equilibrium so critical? The main issue is "mirror seeing," the turbulence seen through the eyepiece of the telescope when the air above the mirror is different from the mirror itself. Since a sandwich mirror cools far more rapidly than a solid mirror of the same thickness, this major source of distortion is eliminated quickly, giving you sharp and stable views. With ever-changing temperatures during observing or imaging, your thick and solid mirror may never reach equilibrium, and never reach its full optical potential. This is one of the major reasons why our lightweight-sandwich mirror has superior optical performance in real world situations, even without an active cooling system. (Active cooling systems, such as fans, introduce their own problems, such as micro vibration, which may seriously degrade the image quality.) Our sandwich mirrors reach equilibrium extremely fast, and without any external disturbing aid.


Engineered Mirror Support:
The UL16 has an extensively modeled and optimized 6-point flotation system that provides more than adequate support for the sandwich mirror. The three-point collimation system is completely independent from the sling lateral support. It will totally eliminate the often-found potato chip astigmatism introduced by sling belt when using the simple 3 pivoted bolts collimation system. In a simple pivoted bolts collimation system, the collimation of the primary mirror may cause the sling belt to pull the mirror axially on the mirror edge, bending the mirror to a potato-chip shape, causing annoying astigmatism.

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#4 hubble-optics

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Posted 20 October 2011 - 10:19 PM

Features of the UL16:

All Metal Construction: The UL16 mechanical structures have been extensively modeled via 3D CAD and advanced FEA to provide the optimal structure strength and stability. Machined with Computer Numerical Control (CNC) technology and hand fitted to assure proper fit and finish. Completed with deluxe and environmentally friendly black powder coating, it is such a pleasant to look at, not to mention the enjoyment to look through.

Dual-Speed 2-inch Linear Drive Crayford Focuser: The Hubble UL16 comes with a precision dual-speed, 2-inch diameter focuser. It's a beautiful piece of precision machining that enhances the viewing experience as well as the overall impression of a premium quality instrument you'll have with this telescope. This focuser is robust! It is a zero-backlash "Crayford-style" design further enhanced with modern "linear bearings" meaning you get a rock-solid, super smooth focusing experience that can handle the weight of even the heaviest of modern eyepieces. Its tension, the pressure on the drawtube, is preset to a very reasonable level, but adjustable to lock heavy equipment in place if desired. The smaller brass focus control adjusts focus at a rate 10 times finer than the larger focus wheels. This fine adjustment allows for critical focusing during high power visual observing or for imaging applications. The focuser has 45mm of travel distance.

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#5 Jim7728

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Posted 21 October 2011 - 11:51 AM

Impressive looking product and beautiful display background.

#6 hubble-optics

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Posted 22 October 2011 - 11:36 AM

UL16 packed in the trunk.

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#7 hubble-optics

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Posted 22 October 2011 - 11:42 AM

UL16 with shroud.

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#8 hubble-optics

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Posted 23 October 2011 - 01:48 AM

Specification:
  • Optical design : Reflector
  • Optical diameter : 406mm
  • Focal length : 1829mm
  • Focal ratio : f/4.5
  • Optics type : Parabolic
  • Eyepieces: Not included
  • Optical quality : Diffraction limited++ (Strehl 0.95+ for the Primary, 1/10 lambada or for the secondary mirror)
  • Finder scope : Not included
  • Focuser : 2" dual-speed linear bearing Crayford
  • Secondary mirror obstruction : 80 mm
  • Secondary mirror obstruction by diameter : 19.7%
  • Secondary mirror obstruction by area : 3.9%
  • Mirror coatings/over-coatings : 92% Semi-Enhanced Aluminum coating on the primary and 96% Enhanced coating on the secondary mirror
  • Tube material : Aluminum tube with black stainless steel knob screws
  • Length of optical tube : 70.0 in.
  • Weight, optical tube : 52.0 lbs.
  • Weight, fully assembled : 60.0 lbs.
  • Additional, optional accessories : 8x50 Finder, Shroud, Wheelbarrow, Vinyl foam Cushioned Grips
  • Other features : Sling lateral support and deluxe push-pull brass knob collimation screws


#9 hubble-optics

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Posted 23 October 2011 - 03:16 AM

A real benefit of our Ultra Light, Ultra Compact and Ultra Portable UL16 to you, a very reasonable worldwide shipping cost for the total system. Please understand the surface shipping is a great value, but may take more than 10 weeks for the delivery.


Country Surface(US$) Air (US$)
US 253 467
US(Hawaii) 253 394
Australia NA 463
Belgium 129 384
Brazil NA 527
Canada 134 401
Denmark 121 338
France 161 391
Germany 148 387
Italy 140 353
Japan 141 231
Korea 103 177
Lithuania NA 958
Mexico 130 462
Netherlands 133 346
New Zealand NA 890(*)
Norway 151 362
Philippines 109 163
Poland 142 350
Romania 192 430
Russia NA 804
Singapore 107 192
South Africa 176 562
Spain 143 408
Sweden 180 386
Switzerland 150 391
UK 172 443

* The exact cost depneds on your specific address

#10 hubble-optics

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Posted 23 October 2011 - 07:36 AM

We have done our homework!

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#11 hubble-optics

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Posted 24 October 2011 - 09:05 PM

Here is more info and where to place your order:
http://hubbleoptics.com/UL16.html

Thank you,
Tong

#12 Juan Irias

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Posted 27 October 2011 - 09:18 AM

Hello! How much can go lower in the altitude? What is the latitude range?

#13 hubble-optics

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Posted 28 October 2011 - 07:35 PM

It can go from the zenith to horizontal!

Thanks,
Tong

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#14 hubble-optics

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Posted 28 October 2011 - 07:44 PM

Pointing to Zenith.

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#15 Ira

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Posted 29 October 2011 - 11:32 PM

How do you balance the scope for different weight eyepieces? Looks very tempting. :)

/Ira

#16 hubble-optics

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Posted 31 October 2011 - 09:10 AM

Hi Ira,

The UL16 is designed to be bottom heavier until a max load of 1.2kg (2.6 lbs) on the focuser, with the shroud installed. Unless you have very heavy load (The weight of heaviest Televue eyepiece, the 2” Ethos 21mm is 2.25 lb), you most likely only need a small counter weight (customer provided) on the secondary cage.

If you do have load heavier than 1.2 kg, then you may need some kind of counter weight (customer provided) loaded to the mirror box at the bottom.

In either case, a few pieces of steel chains, or a sand bag should work well

-Tong

#17 EdK

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Posted 07 November 2011 - 10:06 AM

I am in discussion with this company to make a 14 inch optical set up for my still working CGE mount the total weight would be 37 pounds well within the limits of my mount...
Ed

#18 Traveler

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Posted 07 November 2011 - 11:21 AM

Good Luck Ed. These Hubble UL scopes looks very promising indeed.

#19 shahgazer

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Posted 25 November 2011 - 11:15 AM

Hello,

Nice design. Just one question. Can we use the ServoCAT and Argo Navis with this scope?

Thanks

#20 dvb

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Posted 25 November 2011 - 11:57 PM

My concern would be that the shroud does not extend up past the secondary and focuser - one of the places I'd be sure to flock if I wanted the best contrast. No doubt a wonderful scope at a dark sky site, but a problem in the city.

#21 cloud_cover

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Posted 26 November 2011 - 04:29 AM

Hi Tong,
There have been some comments that the Orion ultralight structure, which is supposedly similar to yours, has issues with the stiffness of the truss frame.
Any comments about this? )
Also, are there any plans to possibly make a rigid shroud extending up from the upper collar to above the secondary and focuser?
Finally, is it possible to visit your factory in Hong Kong for a hands-on experience?
Thanks!

#22 Durval Menezes

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Posted 09 January 2012 - 12:11 AM

Hello,

There have been some comments that the Orion ultralight structure, which is supposedly similar to yours, has issues with the stiffness of the truss frame.
Any comments about this? )


I too would be interested in an answer to this, as flexure could be a problem for collimation. For example, with the scope pointed horizontally and a laser pointer attached to the secondary cage, how much would the laser dot move on a nearby wall when a Nagler 31mm is inserted in the focuser?

Cheers,

#23 hubble-optics

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Posted 19 March 2012 - 08:15 PM

I am so sorry for late response. Yes, we will make a secondary baffle later. As for the stiffness, there are two focuser positions. If you use the one which is right on the top of the side truss joint, there will be no collimation shift when scope is pointed from vertical to horizontal. Here is a test report.
http://www.astromart...?article_id=852

Here is a customer review for the UL16 structure:
http://www.astromart...?article_id=852

Thank you,
Tong

#24 Photoner

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Posted 19 March 2012 - 11:43 PM

Great innovation, way to go.

You have a great idea here and it is evident by the current crashing of the astromart site.

A light weight dob is very attractive to a lot of people.

BTW, very attractive introductory price too.

#25 chuen

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Posted 22 March 2012 - 09:56 AM

Link to AM review is actually this one:
http://www.astromart...?article_id=856






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