Accessory · MSRP $35
Astro-Tech 2" Extension Ring for A-T Ritchey-Chrétien Astrographs
Key specifications
| Accessory type | Adapter |
|---|---|
| Weight | 0.184 kg |
| Path length | 50.8 mm |
All specifications
| Interface | M90×1 threads: male one end, female the other |
|---|---|
| Compatible with | Astro-Tech Ritchey-Chrétien astrographs (AT6RC, AT8RC) between rear cell and focuser |
About
A 2" long, 90 mm diameter extension ring that installs between the rear cell of an Astro-Tech Ritchey-Chrétien and its Crayford focuser, so heavy imaging trains reach focus without extending the drawtube. Machined from aluminium, anodised black, with anti-reflection threading inside.
Where to buy
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