Explore Scientific 20" f/3.6 Truss Tube Dobsonian Telescope

Want the ultimate deep-sky observing experience? Get the Explore Scientific 20" Truss Tube Dobsonian Telescope that offers extraordinary views and ease of use without the worry of high costs or complicated maintenance.

Features

• Massive 20" Aperture: Collects 5,100 times more light than the naked eye for unparalleled deep-sky observations.
• Fast f/3.6 Focal Ratio: Provides bright and clear images, perfect for both planetary and deep-sky viewing.
• High-Quality Optics: Equipped with a quartz main mirror and a large secondary mirror for reduced cooling time and optimal performance.
• 10:1 Two-Speed Helical Focuser: Ensures precise focusing for detailed and crisp images.
• Red Dot LED Finderscope: Simplifies the process of locating celestial objects.
• Floor-Based Manual Alt-Azimuth Mount: Offers smooth and stable tracking of celestial objects.
• Altitude Tension Clutch: Allows for easy adjustment and movement without losing alignment.
• Dual Radial Main-Mirror Fans: Facilitates quick temperature equilibrium, reducing downtime.
• Tool-Free Breakdown and Assembly: Ensures easy transport and setup, even in small cars.
• Durable Construction: TIG welding and optimized aluminum structures provide maximum stiffness with minimal weight.
• Individual Optical Test Certificate: Guarantees the highest quality and performance of each main mirror.
• 94% Reflectivity Coating: High-quality aluminum coating with a durable quartz protection layer for long-lasting performance.

The Explore Scientific 20" Truss Tube Dobsonian Telescope is for you if…

• You’re a Serious Astronomer: Whether you’re a professional or a dedicated hobbyist, you demand the highest quality and performance in your telescope.
• You Crave Detailed Observations: You want to see deep-sky objects and celestial phenomena in breathtaking detail.
• You Need Portability and Ease of Use: You require a large telescope that is easy to transport and quick to set up without tools.
• You Value Durability: You want a robust, high-quality telescope that will last for years with minimal maintenance.
• You’re an Educator or Researcher: You need a reliable, high-performance telescope for teaching or conducting detailed astronomical research.
• You’re an Astrophotographer: You seek exceptional optical performance and compatibility with your existing imaging equipment for stunning astrophotography.
• You’re a Member of an Astronomy Club: You want a telescope that can be easily shared and used by multiple people during group observations.

The Explore Scientific 20" f/3.6 Truss Tube Dobsonian Telescope is designed for astronomers who demand the best. With a 500mm aperture, this telescope collects 5,100 times more light than the naked eye, allowing you to see celestial objects in unprecedented detail. Its fast f/3.6 focal ratio provides bright, clear images, perfect for both planetary and deep-sky viewing.

Equipped with a focal length of 1826mm, this telescope delivers a magnification power of up to 1000x. The high-quality quartz main mirror and large secondary mirror reduce cooling time, ensuring the telescope is quickly ready for use. The optical system, with a 0.23 arc second theoretical limiting stellar magnitude and a 16.9 mag theoretical limiting magnitude, guarantees exceptional image clarity and detail.

The 10:1 two-speed helical focuser allows for precise focusing, ensuring crisp, detailed observations. The red dot LED finderscope simplifies the process of locating celestial objects, while the floor-based manual alt-azimuth mount offers smooth, stable tracking. The altitude tension clutch allows for easy adjustments without losing alignment, making your observing experience seamless and enjoyable.

For astronomers on the go, the tool-free breakdown and assembly make this telescope incredibly portable, fitting even in small cars. The durable construction, featuring TIG welding and optimized aluminum structures, provides maximum stiffness with minimal weight. Each main mirror comes with an individual optical test certificate, ensuring the highest quality and performance.

A second 40° displaced installed mounting plate with a viewfinder shoe allows the rotation of the tube top for a favorable position of the viewfinder tube or the mounting of an additional TELRAD viewfinder. The six supporting feet underneath the rocker box offer perfect stability and guarantee smooth tracking in azimuth. Four smaller fans are installed in the side of the mirror box, along with a large fan under the main mirror, allowing for quicker adaptation to ambient temperature and reducing tube seeing (boundary layer removal). The lateral altitude wheels can now be stowed comfortably in the foam layers of the mirror box.

Designed for both serious and amateur astronomers, this telescope is also an excellent choice for educators and researchers. Its dual radial main-mirror fans facilitate quick temperature equilibrium, reducing downtime and ensuring optimal performance. The high-quality aluminum coating with 94% reflectivity and durable quartz protection layer ensures long-lasting performance, even in challenging conditions.

Discover the Wonders of the Universe

With the Explore Scientific 20" f/3.6 Truss Tube Dobsonian Telescope, you can explore celestial objects in stunning detail. Here are some of the incredible sights you can expect to see:

• Planets: Witness the intricate details of Jupiter's bands, Saturn's rings, and the polar caps of Mars.
• The Moon: Marvel at the craters, mountains, and valleys on the lunar surface.
• Star Clusters: Resolve bright star clusters to their core, revealing countless individual stars.
• Nebulae: Observe the intricate structures and vibrant colors of famous nebulae like the Orion and Eagle Nebulae.
• Galaxies: Discover the spiral arms of distant galaxies such as the Andromeda and Whirlpool galaxies.
• Double Stars: Split tight double stars, showcasing their contrasting colors and relative motion.
• Comets: Track the movement of comets across the night sky, observing their tails and coma.
• Deep Sky Objects: Explore faint and distant objects, including globular clusters and planetary nebulae, with remarkable clarity.

Enhance Your Stargazing Experience with Included Premium Accessories

Unlock the full potential of your Explore Scientific 20-inch Truss Tube Dobsonian Telescope with these top-notch accessories that come with the package. Each accessory is designed to make your stargazing sessions more enjoyable and efficient.

• Two-Speed 2" Rack & Pinion Focuser with 1.25" Adapter: Achieve precise focusing with the dual-speed mechanism, allowing for both coarse and fine adjustments. The included 1.25" adapter ensures compatibility with a wide range of eyepieces.
• LED Red Dot Finder: Easily locate celestial objects with the LED red dot finder, which projects a clear, red dot onto the sky, making alignment quick and effortless.
• Collimation Assist Tool: Keep your telescope perfectly aligned with the collimation assist tool, ensuring optimal performance and crisp, clear images every time.
• Flexible Light Weight Light Baffle: Reduce stray light and enhance contrast with the flexible, lightweight light baffle, designed to improve your viewing experience in various observing conditions.
• Two Primary Mirror Fans: Quickly adjust the temperature of the primary mirror with the dual radial fans, reducing thermal distortion for sharper images. The optional 12V battery power supply ensures you can power the fans anywhere.

Take Your Stargazing to the Next Level

Whether you're a professional astronomer, an astrophotographer, or an astronomy enthusiast, the Explore Scientific 20" f/3.6 Truss Tube Dobsonian Telescope offers unparalleled performance and value. Experience the cosmos like never before with this exceptional telescope, designed to bring the wonders of the universe closer than ever.

Browse the Explore Scientific Truss Tube Dobsonian series: 10" | 12" | 16"