OTA · MSRP $330
Astro-Tech AT70ED 2.8" f/6 ED Refractor OTA
Key specifications
| Aperture | 70 mm |
|---|---|
| Focal length | 420 mm |
| Focal ratio | f/6 |
| Optical design | ED Doublet |
| Weight | 1.81 kg |
All specifications
| Lens coating | Fully multi-coated |
|---|---|
| Focuser type | 2" dual-speed rack and pinion, 10:1 fine focus, no camera angle adjuster |
| Dovetail | None |
About
An entry-level 70 mm f/6 ED doublet using Schott FK-61 glass, fully multi-coated, at 420 mm focal length — compact enough for a backpack. Carries a 2" dual-speed rack-and-pinion focuser with 10:1 fine focus (no camera angle adjuster), brass compression-ring holders for 2" and 1.25" accessories, and a single tube ring with a 1/4"-20 foot.
Where to buy
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