TS Optics 2″/T2 Extension Tube 40mm
When photographing through a telescope, you sometimes find that the focuser cannot reach the correct focus point - especially when a camera or eyepiece needs to sit further from the focuser than usual. The TS Optics 2″/T2 extension tube solves this problem directly. It adds 40mm of optical path length, giving you the extra reach needed to achieve sharp focus where it would otherwise be impossible.
The tube is compact, straightforward to use, and built without unnecessary complexity. Its black finish reduces unwanted light reflections inside the optical system - a practical detail that matters in astrophotography.
What can you use it for?
This adapter works for two common types of telescope photography:
- Prime focus photography - the camera connects directly to the telescope without an eyepiece, capturing the image at the telescope's native focal length.
- Afocal photography - the camera is placed behind an eyepiece to photograph the magnified view.
The T2 thread (M42x0.75) at one end connects to a wide range of cameras and cameras equipped with a T2 adapter ring. The 2″ input fits standard 2-inch focusers and accessories, so this tube slots into most existing telescope setups without any modifications.
Who is this for?
If you are getting started with astrophotography, or if you already have a setup and simply need more optical path length, this extension tube is a simple and effective solution. It is one of those small accessories that becomes essential once you need it.
Key specifications
| Parameter |
Value |
| Extension length |
40mm |
| Input fitting |
2″ (standard 2-inch) |
| Output thread |
T2 (M42x0.75) |
| Finish |
Black (anti-reflection) |
| Compatible with |
Standard 2″ focusers and T2 cameras |
