Tecnosky 110/528 FDC100 OWL PRO Series APO 7-Element Refractor

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:

• 110 mm SLD APO triplet with Hoya FDC100

• Focal length: 528 mm

• Focal ratio: F/4.8

• 4-element ED corrector for Full Frame

• 3.2" rack-and-pinion focuser with rotator

• Backfocus: 55 mm with M48 x 0.75 thread

• Compatible with 2” filters

• Retracted length: 600 mm

• Weight: 8.4 kg

• Included: aluminium case, 2” fast-lock ring, 1.25” eyepiece holder, Vixen bar, Arca-Swiss handle

• 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.