Currency: EUR

Zenithstar 73 III APO

Temporarily out of stock

William Optics

Zenithstar 73 III APO

979,00 €
Varies by model


Backorder. Estimated delivery time 3-18 days.

Backorder. Estimated delivery time 3-18 days.

Product description

The ultra-fine William Zenithstar 73 apo lens telescope is the crown jewel of apo tubes. The two-element objective lens is top quality FPL 53 glass with a very low coefficient of dispersion.

Optically unbeatable

  • Doublet Air-Mounted Lens (FPL-53 Glass)
  • Very sharp image with good color correction
  • Each lens is multi-coated (SMT coated) on all surfaces
  • Great for astrophotography

The 2.5 "R&P Focuser

  • Extremely smooth 360-degree rotating 2.5 "R&P focus 1:10 two-speed: Excellent for your star photography. No image movement!
  • Focus can be locked with two locking screws
  • Large aluminum knob with temperature gauge

Patented design

  • The stainless steel tube is well suited for even heavy imaging equipment
  • Fine adjustment for camera position

Finishing appearance

  • High-quality and stylish appearance: Retractable frost protection, frost protection, white tube color and CNC-turned aluminum
  • The best possible surface treatment
  • Very light for travel, soft carry case included!

We recommend WO focal reducer/field flattener 0.8x!

Product details

Aperture73 mm
Focal RatioF/5.9
Focal Length430 mm
Imaging Circle43 mm
Objective TypeED Doublet, Air Spaced,
Fully Multi-Coated, SMC coating.
Lens ShadeRetractable
Tube Diameter93mm (3.66")
Tube Length390 mm Fully Retracted
Tube Weight2.83 kg

Delivery contents

  • Zenithstar 73 refractor OTA
  • Mounting Rings
  • CNC Carry Handle Bar
  • Dovetail Plate
  • 2.5” R&P Focuser
  • Innovative Bahtinov Mask Cover (Patented)
  • Soft Carry Case

Shipping costs

15,90 €
European delivery 2-5 days.
PostNord Parcel locker
5,90 €
PostNord Home deliver
19,00 €
Environmentally friendly delivery to your door at the agreed time. Trackable deliveries in real time even in the evenings in the biggest cities. Change your delivery as required.
UPS Standard
14,90 €
Delivery to Europe in 2 to 5 days.
5,90 €
12,90 €















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