Extension Tubes

To adjust the back focus, projection distances and working distances, extension sleeves are required, which you can find in this category.
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The extension ring extends an adapter with M54x0.75 connection by 5 mm.
The extension ring extends an adapter with M54x0.75 connection by 8 mm.
Connector socket extension by 25 mm for cameras and eyepieces
Extension tube 60 mm extends the travel of the eyepiece extension for astrophotography
- For all OTAs with 60mm (p=0.75) focuser drawtube
- Very useful for astrophotography
- Extends the distance of back focus on compatible telescopes
- Weight: 115g