Sky-Watcher 1.25-inch 50 mm extension This extension adds 50 mm of physical spacing between a 31.75 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: 1.25-inch extension tube 50 mm SW0185 · Specifications checked against manufacturer data on 2026-11-04
This extension adds 50 mm of physical spacing between a 31.75 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 31.75 mm barrel and the accessory end accepts the same nominal barrel diameter. The aluminium body provides a rigid spacer, with two retaining screws to secure the inserted accessory.
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 SW0185 31.75 mm / 50 mm extension identified. Thread pitches, mass and full external dimensions are not published by the selected source.
| Extension length (mm) | 50 |
|---|---|
| Accessory side | 31.75 mm female receptacle |
| Retaining screws | 2 |
Data sheet
Sky-Watcher 1.25-inch 50 mm extension This extension adds 50 mm of physical spacing between a 31.75 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: 1.25-inch extension tube 50 mm SW0185 · Specifications checked against manufacturer data on 2026-11-04
