D114F900 Newtonian Telescope Astronomical Reflection of Objective Lens

D114F900 is a Newtonian astronomical reflection objective lens with a 114 mm aperture and 900 mm focal length, designed for amateur astronomy and DIY telescope builders. The spherical primary mirror features a focal ratio of f/4 to f/8, enabling bright image formation ideal for observing faint galaxies, nebulae, and planetary surfaces. The compact tube design measures 500 mm in length despite the long focal length, offering portability without sacrificing optical performance.

• 114 mm aperture with 900 mm focal length provides high light-gathering capacity for deep-sky objects
• Focal ratio range f/4 to f/8 allows flexible use for both wide-field and high-magnification observations
• Spherical primary mirror with aluminum coating and protective film ensures durability and reflective efficiency
• Compact 500 mm tube length enables portable setup and easy transport for field use
• Ideal for astrophotography due to strong light convergence at the focal plane