Airy Disk APO 85mm f/6 Triplet FCD-100
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Portable Precision, Exceptional Clarity
The Airy Disk APO 85mm f/6 Triplet is built for astronomers who want premium optical performance in a lightweight, travel-friendly design. Whether you’re exploring the night sky at a dark-sky site or setting up a mobile imaging rig, this compact refractor delivers stunning clarity, color accuracy, and detail.
Featuring a high-precision triplet objective crafted with Hoya FCD-100 extra-low dispersion glass—renowned for its ultra-low chromatic aberration—this APO produces razor-sharp stars, rich contrast, and true, vibrant color. Its outstanding optical correction ensures excellent results for both visual observing and astrophotography.
With an 85mm aperture and fast f/6 focal ratio, the telescope excels at wide-field imaging, deep-sky photography, and crisp views of star clusters, nebulae, and the Moon. Despite its impressive performance, it remains highly compact, making it an ideal choice for travel setups or smaller mounts.
Perfect for:
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Mobile astrophotography and travel setups
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Wide-field deep-sky imaging
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High-quality visual observing
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Beginners upgrading to their first premium APO refractor
Key Features:
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85mm aperture for detailed and bright observations
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Triplet APO design with FCD-100 ED glass for excellent color correction
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Fast f/6 focal ratio optimized for imaging
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Lightweight, compact, and easy to transport
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Smooth, reliable mechanics for precise focusing
Take your stargazing wherever adventure leads. The Airy Disk APO 85mm f/6 Triplet FCD-100 delivers portable power and professional-level performance—anytime, anywhere.
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 mag. | 11.4mag |
| Color | White |
| Tube Material | Aluminum alloy |
| Dovetail style | Vixen |
| Focuser | 2.5" dual-speed 1:10 rack-and-pinion |
| Available FF | 0.92x FF |
| Reduce to | 469mm f/5.5 |
| Backfocus | adjustable |
| CAA | optional |
| For sensor | APS-C |
| Eyepiece Clamp | 2" with 1.25" Adapter |
| Length ext | 465mm |
| Length hood in | 410mm |
| OTA+PARTS | 3.47kg |
| OTA | 2.81kg |
| OTA DIA | 94cm |
| Dustcover | SCREW |
| Ring weight | 0.41kg |
| Total mounting HW | 0.66kg |
| Box size(cm) | 51x32x21.5 |
| Focuser thread front | M94x1 |
| Focuser thread rear | M63x1 |
| Rear thread depth | 5.5mm |
| Rear hole depth | 8mm |