Objective Lens， Objective Lens Astronomical Telescope Accessories Refractor D93,f900Mm, Double Separated Air Gap Multi-Layer Coating,for Doublet Convex Lens

=========High-concerned chemical : None

• Made optical glass with precision polishing, ensuring stable performance and long service life.
• This D93F900 objective lens is a premium accessory for refracting astronomical telescopes, adopting a double-separated air-gap structure and multi-layer coating for excellent optical performance.
• The double separated air-gap design effectively reduces chromatic and spherical aberration, providing sharp, high-contrast images for clear celestial observation.
• Multi-layer coating enhances light transmittance, reduces surface reflection and stray light, ensuring brighter and more stable viewing of celestial bodies.
• Made optical glass with precision polishing, it features low distortion, high durability and reliable long-term performance.
• Standard 93mm aperture and 900mm focal length make it easy to install, perfect for DIY, assembly and upgrading of refracting telescopes.