Airy Disk APO 85mm f/6 Triplet FCD-100

The 85mm f/6 triplet is Airy Disk’s smallest triplet refractor, designed for portable visual observing and astrophotography. It uses Japanese Hoya FCD100 ED glass for vivid color, sharp contrast, and strong correction in a compact form factor.

Paired with the 0.92x two-lens reducer/flattener, the 85APO becomes a five-lens imaging scope, making it a strong choice for mobile astrophotography and on-the-go stargazing.

Specifications

• SKU: 85APO
• Glass used: HOYA FCD100, CDGM
• Aperture: 85mm
• Focal ratio: f/6
• Focal length: 510mm
• Coating: full wideband multi coating
• Resolving Power: 1.36"
• Limit magnitude: 11.4mag
• Tube material: Aluminum alloy
• Dovetail style: Vixen
• Focuser: 2.5" dual-speed 1:10 rack-and-pinion
• Available reducer/flattener: 0.92x FF
• Reduced focal length: 469mm f/5.5
• Sensor coverage: APS-C
• Eyepiece clamp: 2" with 1.25" Adapter
• Length extended: 465mm
• Length hood in: 410mm
• OTA weight: 2.81kg
• Focuser thread front: M94x1
• Focuser thread rear: M63x1

The Airy Disk APO 85mm f/6 Triplet FCD-100 is built for astronomers who want a premium apochromatic refractor for visual observing, deep-sky imaging, planetary viewing, and portable astrophotography. With carefully selected ED glass, precision mechanics, and wideband multi-coated optics, this Airy Disk telescope is positioned for sharp contrast, refined color correction, and dependable performance under the night sky.