Multi-Reducer 0.85X-L (Long)

Full-Frame Imaging for the FC-76D and Classic Fluorites
The Multi Reducer 0.85×-L is the long-focus member of Takahashi’s new reducer lineup, purpose-built for the FC-76D series and legacy fluorite refractors. Using a 3-group, 4-element optical design, it reduces the FC-76D’s focal length from 570 mm to 486 mm (f/7.5 → f/6.4) while preserving exceptional flatness and minimizing chromatic and field aberrations.

With its expanded φ44 mm image circle — significantly larger than previous 76 mm reducers — the 0.85×-L fully supports full-frame sensors and modern astrophotography workflows. Performance remains excellent even with older FC-60 / FC-65 / FC-76 optical tubes.

Key Specifications

• Optical Design: 3 groups, 4 elements

• Compatible Models: FC-76DCU / FC-76DS / FC-76DP / FC-76DC / FC-60 / FC-65 / FC-76 (all discontinued models supported)

• Reduction Factor: 0.85×

• Effective Focal Lengths:
  • FC-76D — 486 mm (f/6.4)
  • FC-60 — 425 mm (f/7.0)
  • FC-65 — 425 mm (f/6.5)
  • FC-76 — 510 mm (f/6.7)

• Image Circle: φ44 mm (full-frame compatible)

• Telescope-Side Thread: M55.9 × 0.75

• Camera-Side Thread: M52 × 0.75

• Dimensions (Ø × L): 60 mm × 54.3 mm

• Weight: ~0.2 kg

• Includes dedicated CA ring for FC-76D series

Note: Minor vignetting may occur with certain older models due to focuser-tube diameter. Optical aberrations are significantly reduced versus earlier Takahashi reducers.