SPECIAL ORDER ONLY

This is available as special order only. 

Please contact us for a custom quote
As these telescopes ship direct from Hong Kong, expect shipping to run high

Description

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 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.

Enhanced Optical Coatings:

Both 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:

he 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.

UL24 Specs

• Optical diameter: 609.6mm (f/3.3)
• 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 lambda or better in PV for the secondary mirror)
• Finder scope: Not included
• Focuser: 2" 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 both of the primary and secondary mirrors
• Tube material: 6063-T6 Aluminum Alloy tubes with black zinc plated 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
• Dawes Limit(arcsec): 0.19
• Rayleigh Limit(arcsec): 0.23
• Limiting Mag: 16.4
• Maximum Magnification: 1200
• Additional, optional accessories: 8x50 Finder, Shroud, Wheelbarrow, Vinyl foam Cushioned Grips
• Other features: Sling lateral support and deluxe push-pull brass knob collimation screws