OTA · MSRP $1,595
Astro-Tech AT90CFT Limited Edition f/6 Triplet APO Refractor Carbon Fiber OTA
Key specifications
| Aperture | 90 mm |
|---|---|
| Focal length | 540 mm |
| Focal ratio | f/6 |
| Optical design | Triplet APO |
All specifications
| Lens coating | Fully multicoated, latest antireflection coatings |
|---|---|
| Focuser type | 2.5" dual-speed rack and pinion, 10:1, camera angle adjuster |
| Tube length | 457.2 mm |
| Dovetail | Vixen |
About
A 90 mm f/6 apochromatic triplet with an FCD-100 ED centre element in a carbon fibre tube, descended from Thomas Back's TMB-92 and revised by Roger Ceragioli, with a guaranteed 0.95 Strehl ratio. The retractable dew shield collapses it to 18 inches; ships with a 2.5" dual-speed focuser and camera angle adjuster, CNC rings with handle, Vixen dovetail and a padded soft case.
Where to buy
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