Explore Scientific Dobson N 500/1800 Ultra Light II

Description

Extreme visual aperture and open-truss deployment define the Explore Scientific Dobson N 500/1800 Ultra Light II, a 20-inch parabolic Newtonian Dobsonian with a 1800 mm focal length and listed f/3.6 optical ratio. Its aerospace-grade aluminum truss framework, stainless steel hardware, 2-inch HEX focuser with 10:1 reduction, dual cooling fans, GRP radial tracking layers, brake adjusters, large rocker box, heavy-duty truss columns, and metal counterweights support large-scale manual deep-sky observation.

The 500 mm optical system is intended for observatory-scale or carefully planned field deployment, with the truss structure breaking into substantial components for transport and storage. Setup requires attention to assembly, collimation, mirror cooling, balance, rocker-base friction, and safe handling of the 53 kg combined system, while the manual Dobsonian design provides direct altitude and azimuth movement without electronic tracking.

Key Features of Explore Scientific Dobson N 500/1800 Ultra Light II

This 20-inch Dobsonian combines a 500 mm parabolic mirror with an 1800 mm focal length, f/3.6 optical ratio, aerospace-grade aluminum truss frame, 2-inch HEX focuser, 10:1 reduction, cooling fans, GRP tracking layers, oversized rocker base, red dot finder, and counterweights.

• 500 mm parabolic Newtonian reflector
• 1800 mm focal length with listed f/3.6 optical ratio
• Aerospace-grade aluminum truss framework
• 2-inch HEX focuser with 10:1 reduction
• 93% system-performance reflective coating
• Advanced flotation primary mirror cell
• GRP radial tracking layers and brake adjusters
• Dual cooling fans, truss columns, finder, and counterweights

Observatory-Scale Deep-Sky Observation

The supplied application focuses on faint galaxies, nebulae, clusters, and planetary structures that benefit from a very large aperture, while the open truss system allows component-based transport and the oversized rocker base provides manual tracking; assembly, collimation, thermal preparation, balance, and safe handling require a planned observing location and suitable storage.

Why Choose Explore Scientific Dobson N 500/1800 Ultra Light II

The Ultra Light 20-inch configuration is relevant when the priority is maximum visual aperture for serious deep-sky work, supported by an open truss design, active primary cooling, large altitude bearings, 10:1 focusing, friction adjustment, counterweights, and a manual rocker platform rather than computerized tracking or rapid one-piece setup.

• 500 mm aperture for the listed observatory-scale application
• Open truss structure for component-based transport
• HEX focuser, cooling fans, rocker base, finder, truss columns, and counterweights included

Explore Scientific 2-Year Limited Warranty

The supplied product information lists a 2-year limited warranty for this Dobsonian telescope, and the applicable warranty terms, optical coverage, truss hardware coverage, focuser coverage, cooling-fan coverage, registration requirements, and authorized service process should be confirmed before purchase because the system’s size, weight, and multi-part assembly require careful handling and storage.