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全單滿3000元免運 on order
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台灣離島地區宅配,全單訂購滿3000元免收「宅配基本運費100元」(僅需支付80元離島運送處理費) on order
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《鴻宇光學售後服務》免費加入天文觀星俱樂部 享受星空下即時教學指導

| William Optics Ultra-Cat 131天文望遠鏡 | |
| 光學形式 | APO折射式望遠鏡 |
| 有效口徑 | 131 mm |
| 鍍膜 | 全面多層鍍膜 |
| 焦距 | 648 mm |
| 焦比(F) | F4.9 |
| 對焦座結構 | WIFD (WO INTERNAL FOCUS DESIGN) |
| 鏡頭玻璃類型 | FPL-53 |
| 鳩尾板型式 | Vixen Type |
| 對焦系統 | WIFD R&P Focuser兼容 ZWO EAF |
| 相機格式 | Medium Format Full Frame | DSLR | Mirrorless | CMOS | CCD |
| 重量 | 本體重 9.95 kg |

