William Optics ZenithStar 81 WIFD Gold OTA | PixelSkiesAstro
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  • William Optics ZenithStar 81 WIFD Gold OTA | PixelSkiesAstro
  • William Optics ZenithStar 81 WIFD Gold OTA | PixelSkiesAstro
  • William Optics ZenithStar 81 WIFD Gold OTA | PixelSkiesAstro
  • William Optics ZenithStar 81 WIFD Gold OTA | PixelSkiesAstro
  • William Optics ZenithStar 81 WIFD Gold OTA | PixelSkiesAstro
  • William Optics ZenithStar 81 WIFD Gold OTA | PixelSkiesAstro
  • William Optics ZenithStar 81 WIFD Gold OTA | PixelSkiesAstro

William Optics ZenithStar 81 WIFD Gold OTA

1 290,00 €
TTC

William Optics ZenithStar 81 WIFD Gold OTA — 81 mm doublet apochromat This refractor provides a 559 mm focal length at f/6.9. The manufacturer lists a 45 mm image circle and optional correctors for photographic use.

Manufacturer model: William Optics ZenithStar 81 WIFD Gold OTA · Specifications checked against manufacturer data on 2026-11-03

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William Optics ZenithStar 81 WIFD Gold OTA — 81 mm doublet apochromat

This refractor provides a 559 mm focal length at f/6.9. The manufacturer lists a 45 mm image circle and optional correctors for photographic use.

Focusing and camera connection

The WIFD rack and pinion focuser provides 77 mm travel. Connections comprise M92 rotator; M92 to M63 adapter.

Field correction

Manufacturer-listed options: Flat6AIII 0.8x. Each combination has a specific spacing and adapter arrangement; see the individual settings in the specifications. A corrector is an optional accessory.

Size and weight

Tube length is 526–607 mm and OTA weight is 3.55 kg. Total weight is 4.56 kg.

William Optics manufacturer manual

Compatibility notes

Prime-lens telescope: corrector compatibility and spacing are model-specific. Optional correctors are listed, not assumed included; corrector adapters may be required.

Additional specifications

Flat6aiii spacing60.2 mm backfocus; 5.2 mm adjustment
85984

Fiche technique

Diamètre (mm)
81
Adaptateurs de caméra
M92 rotator; M92 to M63 adapter
Format de caméra
Full frame, APS-C and Micro Four Thirds
Focale (mm)
559
Rapport F/D
6.9
Course du porte-oculaire (mm)
77
Type de porte-oculaire
WIFD rack and pinion
Cercle image (mm)
45
Correcteurs indiqués par le fabricant
Flat6AIII 0.8x
Plaque de fixation
Vixen / Arca-Swiss dual-sided
Formule optique
Doublet apochromat
Poids du tube optique (kg)
3.55
Poids total (kg)
4.56
Longueur du tube (mm)
526–607
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