Accessory · MSRP $30
Astro-Tech 2" x 35mm Extension Tube
Key specifications
| Accessory type | Adapter |
|---|---|
| Path length | 35 mm |
All specifications
| Interface | 2" barrel in (48mm filter thread); 2" compression-ring holder out |
|---|---|
| Compatible with | 2" focuser drawtubes; Astro-Tech Ritchey-Chrétien focusers |
About
A black-anodised aluminium 2" extension tube that adds 35 mm of light path, replacing what is lost when a 2" star diagonal comes out for a camera or is swapped for a shorter 1.25" diagonal. The barrel has a safety groove and the far end is a 2" holder with a brass compression ring.
Where to buy
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