Zenithstar 73 III
Step into a world of precision astronomy with the William Optics ZenithStar 73 III, the ultimate tool for avid sky watchers and astrophotographers. This advanced apochromatic refractor is engineered with a premium air-spaced doublet lens that incorporates Ohara FPL-53 ED glass to produce exceptionally clear and vivid images with minimal chromatic aberration.
Its compact and robust design, highlighted by a beautifully machined aluminum body and an elegantly anodized finish available in red and gold, ensures both durability and portability. Ideal for capturing stunning wide-field astronomical images and for portable visual astronomy, the ZenithStar 73 combines superior optical performance with ease of use. It includes high-quality accessories such as a CNC machined carry handle, a precision Bahtinov mask for easy focusing, and a protective soft case for travel.
Perfect for both beginners and seasoned astronomers, the William Optics ZenithStar 73 APO III stands out as a versatile and reliable choice for exploring the cosmos.
- Lens Type
- Doublet APO Prime Lens
- Focal Length
- 430 mm
- Diameter
- 73 mm
- Focal Ratio
- f/5.9
- Image Circle
- 45 mm
- Focuser
- 2" R&P Focuser Compatible with EAF
- Adapter Included
- 2" → 1.25" Visual Back
- Optional Flattener
- FLAT 73A 1.0x FLAT 73R 0.8x
- Camera Format
- Full Frame APS-C M4/3
- Dovetail Type
- Vixen ↔︎ Arca-Swiss
- Tube Length
- 330 mm - 420 mm
- OTA Weight
- 2.83 kg / 6.24 lbs
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William Optics Zenithstar 73 APO