The GSO 88mm Kepler flat secondary mirror (minor axis) is designed for Newtonian telescopes, ideal for those looking to upgrade their instrument or build their own telescope. Made by the renowned Taiwanese brand GSO, this elliptical mirror features high optical quality and excellent reflection.

Features:

• Type: Flat secondary mirror
• Shape: Elliptical
• Size (minor axis): 88 mm
• Thickness: 20 mm
• Material: BK7 glass with low thermal expansion coefficient
• Surface treatment: Multi-layer "Enhanced Aluminium" with 93% reflectivity
• Protection: Top layer of silicon dioxide (SiO2) for increased durability
• Optical quality: "Diffraction limited" with excellent surface condition

Advantages:

• High reflectivity with 93% reflection for better light transmission
• BK7 glass mirror for quick thermal stabilization, reducing thermal effects
• Ideal for custom telescope building or upgrading existing instruments

Compatibility:

• Suitable for various sized Newtonian telescopes equipped with elliptical secondary mirrors
• Compatible with GSO brand Dobsonians

Tips and tricks:

• When replacing a secondary mirror, ensure proper alignment of the optics for optimal performance.
• Gently clean the surface of the mirror with a soft, clean cloth to avoid scratches.

Enhance your observations with the GSO 88mm Kepler secondary mirror, an essential component for superior optical performance.