TS Optics T2/T2 Extension Ring 26mm
When building an optical train for visual observing or astrophotography, the standard optical path length is often not enough to reach focus. That is exactly where a simple but essential accessory comes in - the T2/T2 extension ring with a length of 26 mm. This tube fits the standard T2 thread and lets you extend the distance between your telescope and any attached accessory, such as a camera, eyepiece or filter wheel. The solid metal construction ensures a stable, play-free connection - something that matters greatly when imaging at long focal lengths.
When do you need an extension ring?
You will most often need to extend the optical path in two situations. First, when the telescope focuser cannot be racked in far enough to reach focus. Second, when you need to set the correct backfocus distance for a field corrector or flattener. The 26 mm length gives you enough room to fine-tune the position without having to reach for a longer adapter.
The ring is also useful when combining several T2 components in a single train - for example when adding a filter drawer or a derotator. Because it has a T2 thread on both ends, it is compatible with a wide range of products from different manufacturers, which significantly expands the possibilities of your setup.
Testing configurations made easy
This extension ring is equally handy when you are testing different configurations and looking for the ideal backfocus for a particular sensor or eyepiece. Instead of buying a custom-length adapter, you can simply combine several rings of different lengths and adjust the setup as needed. Working with them is straightforward - they thread on by hand without any tools and hold firmly even during extended sessions in the field.
A reliable part of any astronomy kit
The simplicity of this accessory is its greatest strength. The TS Optics T2 26 mm extension ring is a reliable component for any well-equipped astronomy accessory kit - whether you are working with a refractor, a reflector or a catadioptric telescope.
Key features
- Standard T2 thread on both ends
- Length: 26 mm
- Solid metal construction for a stable, play-free connection
- Hand-tightened - no tools required
- Compatible with cameras, eyepieces, filter wheels, field correctors and flatteners
- Works with refractors, reflectors and catadioptric telescopes
- Suitable for both visual observing and astrophotography at long focal lengths
Technical specifications
| Thread |
T2 / T2 (M42 x 0.75) |
| Length |
26 mm |
| Material |
Metal |
| Compatible accessories |
Cameras, eyepieces, filter wheels, field correctors, flatteners, derotators |
| Compatible telescopes |
Refractor, reflector, catadioptric |
