Telescópio refletor SKY-WATCHER para Dobsonian 16 Flex Tube - espelho principal parabólico de 16 polegadas f/4.5, revestimento de alumínio melhorado, distância focal de 1828,8 mm, ótica limitada por difração

With a massive 16-inch (406.4 mm) aperture and a fast f/4.5 focal ratio, this SKY-WATCHER parabolic primary mirror gathers over 2,000 times more light than the naked eye, revealing faint galaxies, nebulae, and planetary detail with stunning clarity. The 1828.8 mm focal length delivers a perfect balance of wide-field views and high magnification potential for serious visual astronomy.

Overview

Engineered for 16-inch Dobsonian optical tubes, this primary mirror is the heart of a large-aperture reflector telescope. The mirror blank is made from optical-grade glass (BK7 equivalent) and features a precision parabolic figure with a surface accuracy of 1/8 wave P-V or better, ensuring diffraction-limited performance. The enhanced aluminum coating with a SiO2 protective overcoat provides >92% reflectivity and long-term durability, even in demanding observing conditions.

What stands out

• 16-inch (406.4 mm) aperture for exceptional light-gathering power
• Fast f/4.5 focal ratio ideal for deep-sky observation and astrophotography
• Diffraction-limited optics with 1/8 wave P-V surface accuracy
• Enhanced aluminum coating with SiO2 overcoat for >92% reflectivity
• Parabolic figure eliminates spherical aberration for sharp, high-contrast images
• Compatible with 16-inch Dobsonian optical tubes (mirror cell not included)

Technical details

• Mirror diameter: 16 inches (406.4 mm)
• Focal length: 1828.8 mm
• Focal ratio: f/4.5
• Mirror type: Parabolic primary mirror
• Substrate material: Optical glass (BK7 equivalent)
• Coating: Enhanced aluminum with SiO2 protective overcoat
• Reflectivity: >92%
• Surface accuracy: 1/8 wave P-V or better
• Optical figure: Diffraction-limited
• Edge thickness: Approximately 40 mm
• Manufacturer: Guan Sheng Optical (GSO)
• Thermal stability: Good for general astronomical observation

Our verdict

For astronomers building or upgrading a 16-inch Dobsonian, this SKY-WATCHER mirror offers premium optical quality at a competitive price. The combination of large aperture, fast focal ratio, and high-reflectivity coatings makes it a formidable tool for exploring the night sky.