Hubble N 457/2058 UL18 f/4.5 Premium Ultra Light DOB Dobson telescope

Introducing the Hubble Optics UL18, a high-quality, large-aperture telescope meticulously engineered for extreme portability without compromising on performance!

The UL18 strikes the perfect balance between robust light-gathering capability and unparalleled portability, making it the ideal choice for serious observers seeking stunning views of the cosmos. Weighing in at a mere 72 pounds, this telescope is one-third the weight of traditional Dobsonian models, yet delivers exceptional optical performance. Its compact design ensures easy transport to dark sky locations by a single person, providing unparalleled convenience and versatility.

Featuring a parabolic primary mirror with a full 18-inch diameter of optical surface, the UL18 offers an impressive 18.4-inch overall diameter, providing approximately 5% more optical surface and light gathering capacity than other 18” scopes in the market. Additionally, with its fast focal ratio mirror, the UL18 ensures optimal eyepiece accessibility, positioned just 68 inches from the ground when pointed at zenith.

The Hubble UL18 is available in two versions: f/4 and f/4.5, each offering unique advantages tailored to your observing preferences.

Advantages of f/4.5:

Sharper images with no need for a coma corrector.

Smaller central obstruction.

Easier achievement of perfect collimation.

Key Features:

Exclusive Sandwich Mirror Technology: Crafted with research-grade optical elements, the sandwich mirror design ensures rapid cooling and eliminates mirror distortion for sharp and stable views.

Semi-Enhanced Optical Coatings: Utilizing recommended 92% Semi-Enhanced coatings on the primary mirror, maximizing light collection and contrast-rich imaging.

Engineered Mirror Support: The optimized flotation system provides robust support, eliminating astigmatism for superior stability.

All Metal Construction: Precision-engineered with CNC technology and hand-fitted for optimal strength and stability.

Linear Drive Crayford Focuser: Featuring a zero-backlash design for smooth focusing, even with heavy eyepieces.

Included Accessories: Red Dot Finder

SPECIFICATIONS:

Optics Type: Reflector

Aperture: 457mm

Focal Length: 2058mm

Aperture Ratio: f/4.5

Light Gathering Capacity: 4260

Tube Construction: Truss Tube

Tube Material: Aluminium

Secondary Mirror Diameter: 70mm

Secondary Mirror Obstruction: 19.7mm

Reflector Reflectivity: 96%

Focuser Type: Crayford

Gear Reduction: 1:10 Fine Movement

Focuser Connection: 2"

Adjustment Range: 50mm

Mount Type: Dobsonian

Total Weight: 32kg

Eyepiece Height at Zenith: 1930mm

Series: Ultra Light

Area of Application: Moon & Planets, Nebulae & Galaxies

Recommended for: Advanced