TeleVue Imaging System 1 mm - Extension Tube
This 1 mm spacer is a spacer ring for the TeleVue Imaging System and is used to precisely adjust the optical distance in your imaging setup. In high-end astrophotography, the correct backfocus is essential for optimal image quality.
With this thin ring, you can adjust the distance between the corrector, adapter, and camera in increments of 1 mm Refine. Ideal when you need just that minimal correction to precisely achieve the prescribed optical configuration.

Accurate back focus adjustment
The TeleVue Imaging System is all about a precisely tuned mechanical and optical setup. A deviation of just a few millimeters can affect field correction or focus. This extension helps you precisely tailor the total optical train.
It is a purely mechanical component and has no optical elements. Therefore, it does not change the image quality on its own, but ensures that other optical components are correctly positioned.
Compatibility
This extension piece is specifically designed for use within the TeleVue Imaging System and connects seamlessly with the associated adapters and components of this system.
What we recommend
- Use multiple rings to achieve the exact desired distance
- Check the prescribed back focus of your corrector or flattener
- Combine with other TeleVue Imaging System components for a perfect fit
What you can do with it
- Adjust back focus accurately
- Optimize imaging train
- Professionally correct small distance differences
Specifications
General
- Type: Adapter
- Design: Extension
- Length: 1 mm
- Compatibility: TeleVue Imaging System





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