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FOR SALE: William Optics ZenithStar 73 APO (Red) w/ Flattener & Upgrad - $900 (vallejo / benicia)
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This is a high-quality FPL-53 doublet APO refractor with buttery-smooth mechanics and classic WO build quality. It’s compact, sharp, and perfect for imaging or visual use.
🔍 Key Specs:
Aperture: 73mm | Focal Length: 430mm | Focal Ratio: f/5.9
FPL-53 Doublet APO optics – excellent color correction
2.5” Rack & Pinion focuser – rotates, smooth, and rock solid
Sliding dew shield, retractable
Red anodized finish – beautiful and functional
Vixen-style mounting rings with integrated handle
Lightweight and airline carry-on capable
✅ Included Accessories:
🔴 William Optics Adjustable Flat73A field flattener (made specifically for the Z73 – corrects edge stars beautifully)
🔩 Vixen-style Dovetail Plate (350mm PLUS series) – longer plate adds balance and mounting flexibility
🧳 Tube rings, top handle, lens caps
🧼 Condition:
Used – Excellent condition
Glass is pristine – no scratches, haze, or fungus
Focuser operates smoothly and holds heavy imaging setups
🎯 This is a complete, high-quality setup for anyone looking to do wide-field imaging with a proven refractor and matching flattener. It works great with APS-C and full-frame sensors and is perfect for targets like nebulae, large galaxies, and Milky Way fields.