* Shipped via Fedex/DHL/UPS, the exact cost depends on your specific
- A quantum leap in optical performance - the UL 24 Truss Dobsonian
telescope's huge 24" diameter primary mirror has 9 times the light
grasp of popular 8" reflectors and 4 times the light grasp of a 12"
- A Premium, Light, Compact and Portable Design - About one third of
the weight of traditional Dobsonian telescopes.
- Outstanding Images - Premium quality, diffraction limited Newtonian
optical systems will deliver stunning views of the heavens from dark
- Light, Strong, Compact and Extremely Portable - The Hubble UL24
features a precision-machined all-metal construction. Fully assembled
the UL24 weighs about 70 kg. It has 8 rigid truss tubes and extremely
strong and portable folding ALT bearing structure. It features a real
mirror box for safe mirror protection, and convenient storage and
- Exclusive Optical Technology - The UL24 features Hubble Optics
lightweight sandwich mirror with an optimized thermal design that cools
up to 10 times faster than conventional solid mirrors.
- Fast Optics - The UL24 fast optical system delivers bright images and
features a short tube, keeping the eyepiece conveniently close to the
- Enhanced Coating - State of the art 96% Enhanced Coating on the
primary and the secondary mirrors.
- Modular and Compact Design: The Hubble UL24 is delivered in
several pre-assembled modules, and the entire system can be
assembled easily in just a few minutes.
24" f/3.3 Premium Ultra Light
8 x 50 Straight Through Illuminated Finder Scope with Brackets and
A top quality 50mm achromatic finder offering an inverted and reversed
image, perfect for Newtonian Telescope. A deluxe quick release double-ring
Finder Bracket including a dovetail base is included. There will be $15
additional charge for the surface delivery, or $25 additional charge for air
The scale markings and open center of the 8 X 50 Straight-Thru Finder
allows you to measure distances and easily center an object in the field of
view. The brightness of the reticle can be adjusted, which is nice when you
are searching for fainter objects.
The illuminator screws into the end of the finder and can be removed easily to
change batteries. The deep red illumination can be adjusted for brightness.
Truss Tube Grips:
0.9m (35.5"), slid-on round cushioned grips, made of vinyl foam, they
insulate, cushion vibration and protect the truss tubes. Free shipping when
ordered with system.
$150 + S&H
The strong stainless steel handles, two top quality 6" pneumatic tires with ball
bearing. The shipping cost will be $70 for surface delivery and $100 for air
delivery, for US. The shipping cost might be different for other countries.
Made from the top quality Nylon/Lycra blended materials, it is an excellent
solution to block out unwanted light pollution from your surroundings. Free
shipping when ordered with the system.
Truss Tube Carry Bag:
Made from deluxe waterproof Nylon material with draw-string cord. Free
shipping when ordered with the system.
5-Star Artificial Star:
The perfect tool to help calibrate your telescope. Now is the time to get one if
you still don't have one yet! Free shipping when ordered with the system.
Sorry, but It is not an option for UL24. You simply do not need one for our
Scope Storage Cover
$120 (free shipping when ordered with the system)
Made with strong polyurethane coated nylon fabric; light reflecting, water and
dust resistant. Complete protection for your scope both in storage and on the
$60 (free shipping when ordered with the system)
A durable plastic mirror cover to protect your mirror.
Hubble SkyHub Wireless Digital Setting Circle System
$199 (Special offer when ordered with UL24 f/3.3)
Breakthrough Wireless Digital Setting Circle with revolutionary high
resolution, low power consumption ball bearing encoders at an inconceivable
More info here
Hubble SiTech and SkySafari based GOTO system
Special offer at $1995 only!
Simply the most powerful and feature rich GOTO system at an extremely
More info here
The Hubble UL24 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 UL24, you are free to travel to
your favorite dark-sky sites anywhere in the world.
Why should you select a Hubble UL24?
The Hubble UL24 is a serious telescope for a serious observer, yet is still
easily transportable to dark sky locations by one person. This scope not only
delivers the premium optical experience you need to explore our universe, but
at only about 70 kg in weight (1/3 the weight of classical Dobsonian
telescopes) it can easily be folded into a compact package that will fit in almost
The UL24 has a parabolic primary with a full 24-inch diameter of optical
surface, a generous 24.4” overall diameter; not a 24-inch blank with a smaller
optical surface, which is about 4% more optical surface and light gathering
than any other 24” scopes in the market.
The 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 easy. The
heaviest component of the UL24 is the primary mirror, which weighs about 30
kg, and the entire telescope is only about 70 kg, which is remarkably light for a
24-inch telescope. In addition, with its fast focal ratio mirror, the Hubble UL24
telescope has an eyepiece location only about 77" from the ground when the
UL24 is pointed at zenith.
The Hubble UL24 is the perfect combination of power and portability. With this
telescope, you are guaranteed to have a lifetime of exceptional observing
experiences, all in a compact 70-kg package!
Features of the UL24:
Exclusive Sandwich Mirror Technology: Our sandwich mirror technology
has been used to manufacture research-grade optical elements for over 6
years at research facilities such as NASA, Princeton University, California
State Polytechnic University San Luis Obispo, the US Army, and in
professional and 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 provides 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 24-inch mirror and means the
mirror can deliver great views even as the air around the telescope is
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 thus 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.
Enhanced Optical Coatings: The Hubble UL24 primary and secondary
mirrors are coated with 96% Enhanced optical coatings to assure it collects as
many (while scattering as little) photons as possible to focus it into a bright
and contrast-rich image. The optimal 96% enhanced coating has multiple over-
coatings of precision controlled dielectric layers to maximize the reflectivity and
provide excellent chemical and mechanical protection for the mirror coating.
A Real Mirror Cell In A Real Mirror Box: The UL24 has an extensively
modeled and optimized 18-point flotation system and both sling and 90 degree
pivoting lateral supports that provides excellent support for the 24-inch
sandwich mirror. The three-point rod-end with easy two front access
collimation system is completely independent from the lateral support. It will
totally eliminate the often-found potato chip astigmatism introduced 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. It also comes with a real mirror box
for easy and safe mirror protection and transportation.
All Metal Construction: The UL24 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. We use
T6063-T3 aluminum alloy truss tubes, structure steel mirror cell and aluminum
alloy OTA and mount structure, complete with a deluxe and environmentally
friendly black powder coating. As a whole, the structure is such a pleasure to
look at, not to mention the enjoyment to look through!
Dual-Speed 2-inch Linear Drive Crayford Focuser: The Hubble UL24
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 a robust 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 draw tube) is
preset to a very reasonable level, but also adjustable to lock heavy equipment
in place if desired. The smaller stainless steel 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 about 50mm of travel distance.
- Optical design : Reflector
- Optical diameter : 609.6mm
- Focal length : ~2012mm (f/3.3)
- Eyepiece height at zenith: 1955mm (~77 in)
- Optics type : Parabolic
- Eyepieces: Not included
- Optical quality : Diffraction limited++ (Strehl 0.95+ for the primary mirror,
1/10 lambada or better in PV for the secondary mirror)
- Finder scope : Not included
- Focuser : 2" 10:1 dual-speed linear bearing Crayford
- Secondary mirror obstruction : 127 mm
- Secondary mirror obstruction by diameter : 20.8%
- Secondary mirror obstruction by area : 4.3%
- Mirror coatings/over-coatings : 96% Enhanced coating on the primary
and secondary mirror
- Tube material : 6063-T6 Aluminum Alloy tubes with black stainless steel
knob screws; Aluminum Alloy main structure (OTA and mount) and
structure steel mirror cell.
- Length of optical tube : ~2000mm, 79 in
- Weight, optical tube : 61 kg
- Weight, fully assembled : ~70 kg, ~153 lbs
- Additional, optional accessories : Red-dot or 8x50 Finder, Shroud,
Wheelbarrow, Vinyl foam cushioned grips
- Other features : Sling lateral support and deluxe push-pull brass knob
Shipping and Handling:
A real benefit of a our Ultra Light, Ultra Compact and Ultra Portable UL24 to
you, a very reasonable worldwide shipping cost (at least for most of the
countries) for the total system. Please understand the surface shipping is a
great value, but may take more than additional 10 weeks for the delivery.
UL24 will be shipped in 5-6 boxes: the main structure 1 & 2, the truss tube,
the accessories (optional) and the primary mirror.
$4750 (f/3.3), deposit at the order time,
rest, including options and shipping will
be paid before the delivery (about 90
days after the deposit) via a Paypal
Please note that the above 90 days
delivery is the estimated production lead
time only, which does not include
shipping transit time.
Please specify your requested options in
your payment for the deposit.
UL 24 f/3.3