Astro-Tech AT10RC Ritchey-Chretien
Astro-Tech
Astro-Tech AT10RC Ritchey-Chretien is a 254 mm Ritchey-Chretien astrograph for galaxies, planetary work, and other small high-resolution targets.
Best Current Offer
Specifications
Optics
- Optical design
- Ritchey-Chretien astrograph
- Aperture
- 254 mm
- Focal length
- 2032 mm
- Focal ratio
- f/8
- Dawes limit
- 0.46"
- Glass / elements
- Hyperbolic primary and secondary mirrors
Specifications
- Back focus
- 235 mm
- Weight
- 34.4 lb (15.6 kg)
Imaging
- Camera format
- APS-C / full-frame with corrector
- Full-frame coverage
- Yes
- Corrected field
- Coma-free RC field; flattener recommended for larger sensors
Mechanical
- Focuser
- Dual-speed focuser
Astrophotography Fit
Best for galaxies, planetary work, and other small high-resolution targets when the mount, camera format, and correction hardware are chosen as one system.
Astro-Tech AT10RC Ritchey-Chretien sits in the telescope slot for galaxies, planetary work, and other small high-resolution targets. The useful headline specs are aperture 254 mm, focal length 2032 mm, f/8.
Camera coverage: APS-C / full-frame with corrector.
Long focal length optics reward patience. Guiding accuracy, seeing, focus stability, mirror behavior, and mount capacity matter more here than they do on small refractors.
Best paired with
- Heavy-duty GoTo mount with generous imaging payload headroom
- Off-axis guider, sensitive guide camera, and motorized focuser
- Small-pixel planetary cameras or appropriately sized cooled deep-sky cameras
Not recommended for
- Undermounted beginner rigs or windy portable setups
- Large nebula framing without a reducer or mosaic plan
- First deep-sky setup if guiding and collimation still feel unfamiliar
Where To Buy
Some links on this page are affiliate links. Prices and availability are pulled automatically from each retailer and updated daily.
| Retailer | Price | Availability | View Offer |
|---|---|---|---|
| Astronomics Astronomics | $2,495.00 | In stock Updated 8/4/2026 | View Offer - $2,495.00 |
Price History
Chronological retailer pricing with out-of-stock points shown at reduced opacity.