William Optics UltraCat 56 WIFD | PixelSkiesAstro
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  • William Optics UltraCat 56 WIFD | PixelSkiesAstro
  • William Optics UltraCat 56 WIFD | PixelSkiesAstro
  • William Optics UltraCat 56 WIFD | PixelSkiesAstro
  • William Optics UltraCat 56 WIFD | PixelSkiesAstro
  • William Optics UltraCat 56 WIFD | PixelSkiesAstro
  • William Optics UltraCat 56 WIFD | PixelSkiesAstro
  • William Optics UltraCat 56 WIFD | PixelSkiesAstro
  • William Optics UltraCat 56 WIFD | PixelSkiesAstro
  • William Optics UltraCat 56 WIFD | PixelSkiesAstro
  • William Optics UltraCat 56 WIFD | PixelSkiesAstro

William Optics UltraCat 56 WIFD

1.490,00 €
Tasse incluse

William Optics UltraCat 56 WIFD — 56 mm Petzval astrograph The 5-element optical system provides a 269 mm focal length at f/4.8, with a 50 mm image circle. Its Petzval design does not require an external field flattener.

Manufacturer model: William Optics UltraCat 56 WIFD · Specifications checked against manufacturer data on 2026-11-03

William Optics UltraCat 56 WIFD — 56 mm Petzval astrograph

The 5-element optical system provides a 269 mm focal length at f/4.8, with a 50 mm image circle. Its Petzval design does not require an external field flattener.

Focus and camera alignment

The WIFD rack-and-pinion focuser provides 30 mm travel and 1:10 fine adjustment. A camera rotator controls framing, while the Sensor Tilt Xterminator allows sensor alignment. The lens cover incorporates a Bahtinov focusing mask.

Imaging connections

STX tilt adjuster / rotator; interchangeable M68 to M48 and M68 to M54 adapters. Petzval focus depends on the complete camera train remaining within the telescope's focusing range.

Size and mounting

The tube length is 296.3–348.3 mm. OTA weight is 2.56 kg and the manufacturer specification table lists 3.21 kg total weight. The mounting plate is 210 mm Vixen-style / Arca-Swiss dual-sided.

William Optics manufacturer manual

Optical construction

William Optics specifies two Super ED elements, one ED element, one lanthanum element and one X-element in the five-element optical system. The internal focuser moves the focusing mechanism within the telescope, while the rear tilt and rotation adjustments support sensor alignment and framing.

Compatibility notes

Petzval focus range must accommodate the complete imaging train; do not interpret recommended camera spacing as an exact flattener backfocus. Confirm supplied adapters and revision.

88286

Scheda tecnica

Apertura (mm)
56
Adattatori per camera
STX tilt adjuster / rotator; interchangeable M68 to M48 and M68 to M54 adapters
Formato camera
Full frame, APS-C and Micro Four Thirds
Rotazione camera
Camera angle rotator
Messa a fuoco elettronica
ZWO EAF compatible; use the manufacturer installation guide for the selected EAF model.
Richiede spianatore di campo esterno
No
Rapporto della messa a fuoco fine
1:10
Focale (mm)
269
Rapporto focale
4.8
Focheggiatore
WIFD rack-and-pinion
Corsa del focheggiatore (mm)
30
Maschera di messa a fuoco
Bahtinov mask incorporated in lens cover
Cerchio d'immagine (mm)
50
Elementi ottici
2 Super ED, 1 ED, 1 lanthanum and 1 X-element (5 elements total)
Piastra di montaggio
210 mm Vixen-style / Arca-Swiss dual-sided
Schema ottico
5-element Petzval
Peso del tubo ottico (kg)
2.56
Regolazione del tilt del sensore
Sensor Tilt Xterminator
Peso totale (kg)
3.21
Lunghezza del tubo (mm)
296.3–348.3
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