Azure Spy 100mm Achromatic Doublet Lens for Telescope, 700mm Focal Length, Air-Spaced AR Coated Optics, Precision Black Anodized Aluminum Cell with Threaded Mount

🔷 Premium Product Description (700mm FL)

The Azure Spy 100mm Achromatic Doublet Lens (700mm FL) is a high-performance optical objective designed for wide-field astronomical observation and advanced telescope systems. With a 100mm clear aperture and a shorter 700mm focal length, this lens delivers brighter, wider field views—ideal for observing star clusters, nebulae, and large celestial objects.

Engineered with an air-spaced achromatic doublet design, the lens effectively minimizes chromatic aberration while maintaining excellent image sharpness and contrast. The use of premium optical glass combined with multi-layer anti-reflection (AR) coatings ensures maximum light transmission and reduced glare, resulting in clear and vibrant images.

The lens is housed in a precision-machined black anodized aluminum cell, featuring a deep protective structure and internal threading for secure mounting. This robust design not only protects the optics but also ensures accurate alignment and easy integration into telescope tubes and custom optical assemblies. The matte black finish further reduces stray light, enhancing overall optical performance.

🔷 Key Features

• 🔭 100mm Clear Aperture – Excellent light-gathering for bright imaging
• 🌌 700mm Focal Length – Wider field of view, ideal for deep-sky observation
• 🌈 Achromatic Doublet (Air-Spaced) – Reduced color fringing
• ✨ Multi-Coated AR Optics – High transmission & improved contrast
• 🛠️ Black Anodized Aluminum Cell – Durable and corrosion-resistant
• 🔩 Threaded Mount Design – Easy installation and secure fit
• 🧲 Deep Lens Housing – Better protection and alignment stability

🔷 Applications

• Wide-field refractor telescopes
• Deep-sky observation (nebulae, clusters, galaxies)
• Astrophotography setups
• DIY telescope manufacturing
• Optical experiments and R&D

🔷 Why Choose This 700mm Version?

Compared to longer focal lengths, the 700mm configuration offers a wider field of view, making it perfect for scanning large areas of the night sky while still maintaining excellent clarity and brightness.