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Tecnosky 110/528 FDC100 OWL PRO Series APO 7-Element Refractor
TECNOSKY OWL110 PRO
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Tecnosky 110/528 FDC100 OWL PRO Series APO 7-Element Refractor
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Tecnosky 110/528 FDC100 OWL PRO Series APO 7-Element Refractor (integrated quadruplet field corrector)
Long description:
The Tecnosky 110/528 F/4.8 OWL PRO Series refractor is a top-tier instrument designed for demanding astrophotographers. It features a high-quality FMC triplet objective using premium Japanese Hoya FDC100 glass, delivering true Apo performance with excellent contrast.
It includes a 4-element ED field flattener/reducer, aligned and optimized inside each OTA. The corrected field fully covers Full Frame sensors, ideal for use with modern CMOS cameras.
Its 3.2" rack-and-pinion focuser supports up to 6 kg payloads. A camera rotator is integrated, and the back thread is M48 x 0.75 with a 55 mm backfocus, allowing the use of 2” filters. The micrometric focusing knob ensures perfect collimation and ultra-precise focusing.
The CNC-machined tube includes strong mounting rings, a long Vixen-style bar, and an Arca-Swiss compatible handle. A custom-fitted aluminium transport case is provided for protection.
Every telescope is delivered with an individual interferometric certificate ensuring a minimum Strehl ratio of 0.95. Though designed for imaging, this refractor can achieve 350x magnification with 1.25” eyepieces.
Technical data:
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110 mm SLD APO triplet with Hoya FDC100
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Focal length: 528 mm
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Focal ratio: F/4.8
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4-element ED corrector for Full Frame
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3.2" rack-and-pinion focuser with rotator
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Backfocus: 55 mm with M48 x 0.75 thread
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Compatible with 2” filters
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Retracted length: 600 mm
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Weight: 8.4 kg
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Included: aluminium case, 2” fast-lock ring, 1.25” eyepiece holder, Vixen bar, Arca-Swiss handle
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Interferometric certificate with Strehl ≥ 0.95
Like the entire OWL series, an individual interferometer certificate is provided with each instrument 
According to our optical tests, this refractor showed perfect collimation also thanks to the simple 3-point frontal collimation system.
Each telescope is checked on an optical bench before delivery!
Additional information:
This OTA is individually tested and aligned for maximum optical performance. The optical system provides perfect collimation and a fully corrected image circle for Full Frame sensors. It is ideal for deep-sky imaging with unmatched precision and clarity.
