TS Optics T2 Reversion Adapter - Full-Length Female T-Thread
This compact aluminium adapter from TS Optics solves a common problem in astrophotography: reversing the T2 thread orientation in your optical train. The T2 reversion adapter features a full-length female T2 thread running along its entire body, giving you a secure, play-free connection between components. The optical length is 9 mm - a value you need to account for when calculating your total optical path.
Lightweight and rigid
The body is machined from aluminium, keeping weight low while maintaining solid mechanical rigidity. Use this adapter wherever you need to reverse the thread direction without adding bulky extra spacers to your setup.
Built for astrophotographers
Astrophotographers who build custom optical trains will find this adapter especially useful. When combining camera reducers, filter drawers, and spacer rings from different manufacturers, the thread orientation matters. The right orientation keeps your whole setup compact. The wrong one means adding unnecessary adapters in between.
Technical specifications
| Parameter |
Value |
| Thread type |
T2 female (full-length, both ends) |
| Optical length |
9 mm |
| Body material |
Aluminium |
| Compatible thread standard |
T2 (M42 x 0.75) |
What is this adapter for?
The T2 thread is a standard connection used across a wide range of astronomical accessories - camera adapters, filters, reducers, and more. Sometimes two components both have male threads and cannot connect directly. This reversion adapter bridges that gap cleanly and without adding unnecessary length to your optical train.
Key benefits
- Reverses T2 thread orientation in any optical train
- Full-length female T2 thread for maximum contact and stability
- Play-free, secure connection between components
- Lightweight aluminium construction
- Known optical length of 9 mm for accurate back-focus calculations
- Compatible with all standard T2 accessories
Who needs this adapter?
This adapter is aimed at intermediate and advanced astrophotographers who assemble their own optical trains. If you regularly work with camera reducers, filter drawers, and extension rings from different brands, you have likely encountered a thread orientation mismatch. This small adapter resolves that problem quickly and keeps your setup compact.
