Tecnosky 0.8× Field Flattener/Reducer – 4 Element Design for 400–600 mm Focal Lengths

Tecnosky 0.8× Field Flattener/Reducer – 4 Element Design for 400–600 mm Focal Lengths

DESCRIPTION

This Tecnosky 0.8× reducer/corrector uses a four-element optical design to improve field correction and reduce chromatic aberration. It is intended for use with refractors of 400 to 600 mm focal length, especially Tecnosky models like the ED70, ED80, EDT80, and 80 Apo Triplet.

The reducer features a 2" barrel for direct insertion into standard focusers. The camera side provides a T2 thread (M42×0.75 mm), offering wide compatibility with imaging accessories and adapters.

The required backfocus depends on the focal length of the optical tube, as shown below.

WORKING DISTANCE (BACKFOCUS)

• Focal length ≤ 350 mm → 70 mm

• Up to 420 mm → 65 mm

• 450–500 mm → 61 mm

• 510–600 mm → 58 mm

• 610–700 mm → 57 mm

• 710–790 mm → 56 mm

• ≥ 800 mm → 55 mm

TECHNICAL SPECIFICATIONS

• Type: Reducer / Corrector

• Reduction factor: 0.8×

• Optical elements: 4

• Optical coating: Multi-coated

• Camera-side thread: T2 (M42×0.75 mm)

• Barrel size: 2" (50.8 mm)

• Backfocus: 55–70 mm depending on telescope focal length

• Compatibility: Refractors 400–600 mm, ED70, ED80, EDT80, 80 Apo Triplet