A quantum leap in optical performance. The UL24's massive 24" primary mirror delivers 9 times the light
grasp of an 8" reflector, yet the entire telescope weighs just 70 kg, which is remarkably portable for its
class. Featuring our sandwich mirror, 18-point flotation, and folding ALT bearing for car-friendly
transport.
f/3.3: $10,500
USD
Deposit (50% of base system)
Sandwich Mirror
Lightweight
All Metal
Dual-Speed Focuser
Aperture
610mm (24")
Focal Ratio
f/3.3
Mirror
Sandwich
Weight
~70 kg / 153 lbs
Exclusive Sandwich Mirror Technology
The lightweight sandwich mirror design cools dramatically faster than solid mirrors, minimizing thermal
gradients and eliminating a major source of image distortion. Unlike fan-based cooling, this passive
design achieves rapid and stable thermal equilibrium naturally — without introducing vibration.
Why this matters
One of the primary limitations in large-aperture telescopes is "mirror seeing" — turbulence caused by
temperature differences between the mirror and the surrounding air. In changing conditions, a thick
solid mirror may never fully reach equilibrium, preventing it from achieving its full optical
performance. The sandwich mirror design minimizes this effect, allowing the system to reach optimal
performance quickly and consistently, delivering sharper and more stable views without the need for
active cooling.
Enhanced Optical Coatings
96% enhanced reflective coatings on both primary and secondary mirrors with precision-controlled
dielectric layers. Maximum light throughput for bright, contrast-rich images on deep-sky targets.
18-Point Flotation Mirror Cell
Optimized 18-point flotation system with both sling and 90-degree pivoting lateral supports. Three-point
rod-end collimation is completely independent from lateral support, eliminating the potato-chip
astigmatism found in simpler designs. Housed in a real mirror box for safe transport.
All Metal Construction
CNC-machined 6063-T6 aluminum alloy truss tubes, structural steel mirror cell, and aluminum alloy OTA
and mount structure. 8 rigid truss tubes and folding ALT bearing for extreme portability. Finished with
environmentally friendly black powder coating.
A full 24-inch diameter of optical surface (24.4" overall) — about 4% more optical surface and light
gathering than any other 24" scope on the market. 9 times the light grasp of an 8" reflector.
Remarkably Portable
At only about 70 kg (1/3 the weight of classical Dobsonian telescopes), the UL24 folds into a compact
package that fits in almost any car. The eyepiece is just 77" from the ground at zenith.
The Hubble UL24 is a serious telescope for a serious observer, yet is still easily transportable to dark sky
locations by one person. The heaviest single component is the primary mirror at about 30 kg. This is the perfect
combination of power and portability, which is a lifetime of exceptional observing in a compact 70-kg package.
"The telescope (Hubble UL24) performed quite well again in Argentina for the MU69 campaign there. The
combination of the 24" and PCO camera is excellent for occultation work. This setup easily outperforms any
other portable occultation setups I know of."
Matthew Nelson, NASA New Horizons Team, University of Virginia
Matthew Nelson, NASA New Horizons Team, Department of Astronomy, University of Virginia
Jeff Roberson's UL24
Rick Foster with his UL24
Rick Foster with his UL24 at the RASC-TO Dark Sky Observatory in Blue Mountains near Collingwood Ontario
Jeffrey Hines's UL24 telescope
Jeffrey Hines's UL24 telescope — alternate view
Jeffrey Hines's UL24 telescope — closeup
UL24 at Alfa and Omega Universe Chile
UL24 setup in Chile
UL24 observing session in Chile
UL24 under dark skies in Chile
Members of Alfa and Omega Universe Chile
Members of Alfa and Omega Universe Chile — group photo
Add these when ordering, or contact us at info@hubble-optics.com
View all 12 accessories
Carbon Fiber Truss Tubes
$800
Elegant, stronger, and lighter Carbon Fiber Truss Tubes.
Red Dot Finder Scope
$45
Light weight Red Dot Finder with brackets and dovetail. Simple, effective, and easy to adjust. Free
shipping with system.
8x50 Illuminated Finder Scope
$100
Top quality 50mm achromatic finder with dovetail bracket. Scale markings and adjustable red illumination.
+$25 shipping.
Truss Tube Grips
$7 each
0.9m cushioned vinyl foam grips — insulate, cushion vibration, and protect the truss tubes. Free shipping
with system.
Shroud
$120
Top quality Nylon/Lycra blend. Blocks stray light for better contrast. Free shipping with system.
Wheelbarrow Handle
$250
Stainless steel handles with two 6" pneumatic tires and ball bearings. Includes $100 shipping. Order with
system only.
Truss Tube Carry Bag
$60
Deluxe waterproof Nylon bag with draw-string cord. Free shipping with system.
5-Star Artificial Star
$22
Essential collimation tool. Free shipping when ordered with system.
Scope Storage Cover
$120
Polyurethane-coated nylon — light reflecting, water and dust resistant. Full protection in storage and in
the field. Free shipping with system.
Mirror Cover
$45
Strong plastic mirror cover. Free shipping with system.
Light Baffle
$50
Reduces stray light for improved contrast. Free shipping with system.
SkyHub Wireless DSC
$249 + $45 S&H
Wireless Digital Setting Circle with high resolution, low power ball bearing encoders.
Learn more
No fan needed — our sandwich mirror reaches thermal equilibrium without one.
There's a 50% deposit for the base system, and the full payment for the optional accessories at the order
time. The rest including shipping will be paid before the delivery (about 90 days after the deposit) via a
PayPal invoice.
UL24 will be shipped in 4 boxes: the main structure 1 & 2, the truss tubes, and the primary mirror.
Country
Regular (US$)
US
~1750*
Others
Contact us
* Shipped via FedEx, the exact cost depends on your specific address.
