Tecnosky 2.5" Full Frame 1X Field Flattener for Refractor

Tecnosky 2.5" Full Frame 1X Field Flattener for Refractor

DESCRIPTION
The Tecnosky 2.5" Full Frame 1X field flattener is a large-aperture optical corrector designed to flatten the image field in refractors with focal ratios between f/5 and f/9. Built for full-frame imaging, it delivers excellent correction across the entire field.

On the telescope side, the flattener includes a male M63 thread compatible with the Tecnosky Apo 90 refractor. By unscrewing the M63 adapter, a male M68 thread is revealed, suitable for 3" focusers found on the Tecnosky 115 mm, 130 mm, 102 mm triplet refractors, and similar SharpStar models.

On the camera side, the flattener provides an M69x1 thread offering maximum backfocus flexibility depending on the telescope focal length. A flange with M48 thread and a fixed 55 mm distance is supplied, ideal for full-frame DSLR and mirrorless sensors.

TECHNICAL SPECIFICATIONS

• Brand: Tecnosky

• Model: 2.5" Full Frame 1X Field Flattener

• Type: 1X Field Flattener (non-reducing)

• Compatible focal ratio: f/5 to f/9 refractors

• Telescope side threads:

  • M63 male (removable adapter)

  • M68 male

• Camera side thread:

  • M69x1

• Included adapter: M48 with 55 mm backfocus (DSLR standard)

• Sensor compatibility: Up to Full Frame

• Corrector diameter: 2.5"

• Intended use: Wide-field astrophotography with refractors

• Construction: CNC-machined metal