Tecnosky Telescope AC 210/1200 Goliath OTA (64785)

The Tecnosky Telescope AC 210/1200 Goliath OTA is a premium refractor designed for advanced astronomers and observatories. With its impressive 210mm aperture, this telescope provides clear, obstruction-free views, making it possible to resolve double stars and observe fine details in deep sky objects. The fast focal ratio of f/5.7 makes it especially suitable for wide-field deep sky observation and narrow-band astrophotography using filters like H-alpha, OIII, and SII. The robust construction includes a thick aluminum tube and high-quality Geoptik Losmandy rails, ensuring stability and durability for demanding use.

Key Features:

• 210mm aperture for high-resolution, bright images without central obstruction

• Fast f/5.7 focal ratio, ideal for wide-field deep sky viewing and narrow-band imaging

• Achromatic air-spaced doublet lens, best for deep sky and binary star observation (some chromatic aberration on bright objects)

• Compatible with H-alpha, OIII, and SII filters for advanced astrophotography

• Can be used with a DayStar QUARK filter to convert into a solar telescope

• Excellent lunar and planetary performance when paired with a Baader Semi APO filter to reduce color fringing and enhance contrast

• Sturdy 3mm thick aluminum tube with internal baffles to suppress stray light

• Original Geoptik Losmandy-style prism rail for secure mounting

• Manufactured in Italy for superior craftsmanship

Specifications:

• Optics

  • Type: Refractor

  • Design: Achromat

  • Aperture: 210 mm

  • Focal Length: 1200 mm

  • Focal Ratio: f/5.7

  • Resolving Capacity: 0.66 arcseconds

  • Limiting Magnitude: 13.4

  • Light Gathering Power: 900x

  • Maximum Useful Magnification: 420x

  • Tube Weight: 17 kg

  • Tube Material: Aluminum

  • Coating: Multi-coated

  • Stray Light Baffles: Yes

• Focuser

  • Type: Gear rack

  • Eyepiece Connection: 2"

  • Free Aperture: 76 mm

  • Ring Clamp: Yes

  • Load Capacity: 6 kg

  • Gear Reduction: 1:10 fine focusing

  • Adjustment Range: 40 mm

  • Rotating: Yes

• Mount

  • Type: OTA (Optical Tube Assembly)

  • Mounting: No mount included

• Included Accessories

  • Finder Scope: Not included

  • Dew Shield: Yes

  • Deviating Optics: Not included

  • Prism Rail: Losmandy-Style

  • Finder Base: Vixen/Skywatcher Level

• General

  • Series: Goliath

• Area of Application

  • Astrophotography: Yes

  • Moon & Planets: Yes

  • Nature Observation: No

  • Nebulae & Galaxies: Yes

  • Sun: Only with appropriate solar filter

• Recommended For

  • Beginners: No

  • Advanced Users: Yes

  • Observatories: Yes

This telescope is an excellent choice for experienced astronomers and observatories looking for a powerful and versatile refractor for deep sky, lunar, planetary, and solar (with proper filter) observation and imaging.