Sky-Watcher 2-inch 50 mm extension This extension adds 50 mm of physical spacing between a 50.8 mm push-fit focuser or accessory holder and a matching eyepiece or camera adapter. It is useful when the optical arrangement requires the accessory to sit farther out to reach focus.
Manufacturer model: 2-inch extension tube 50 mm SW0186 · Specifications checked against manufacturer data on 2026-11-04
This extension adds 50 mm of physical spacing between a 50.8 mm push-fit focuser or accessory holder and a matching eyepiece or camera adapter. It is useful when the optical arrangement requires the accessory to sit farther out to reach focus.
The telescope-facing end is a male 50.8 mm barrel and the accessory end accepts the same nominal barrel diameter. The aluminium body provides a rigid spacer. A 48 mm filter thread is also listed.
The tube contains no optical elements and does not change the telescope’s focal length. Check the required outward extension and available focuser travel before choosing a spacer.
Exact SW0186 50.8 mm / 50 mm extension identified. Published filter diameter is 48 mm; a thread pitch is not assumed. Mass and full external dimensions are not published.
| Extension length (mm) | 50 |
|---|---|
| Accessory side | 50.8 mm female receptacle |
Ficha técnica
Sky-Watcher 2-inch 50 mm extension This extension adds 50 mm of physical spacing between a 50.8 mm push-fit focuser or accessory holder and a matching eyepiece or camera adapter. It is useful when the optical arrangement requires the accessory to sit farther out to reach focus.
Manufacturer model: 2-inch extension tube 50 mm SW0186 · Specifications checked against manufacturer data on 2026-11-04
