Astro-Tech AT66EDQ
Astro-Tech
Astro-Tech AT66EDQ is a 66 mm Quadruplet flat-field APO refractor for wide-to-mid-field nebulae and general deep-sky imaging.
Best Current Offer
Specifications
Optics
- Optical design
- Quadruplet flat-field APO refractor
- Aperture
- 66 mm
- Focal length
- 462 mm
- Focal ratio
- f/7
- Dawes limit
- 1.76"
- Glass / elements
- ED quadruplet astrograph
Specifications
- Focuser
- 2.8\" dual-speed rack-and-pinion, 10:1 fine focus
Imaging
- Image circle
- 44 mm
- Camera format
- Full frame / APS-C / Micro 4/3
- Full-frame coverage
- Yes
- Back focus
- Built-in field correction; no separate flattener spacing
- Corrected field
- Native flat imaging field
Astrophotography Fit
Best for wide-to-mid-field nebulae and general deep-sky imaging when the mount, camera format, and correction hardware are chosen as one system.
Astro-Tech AT66EDQ sits in the telescope slot for wide-to-mid-field nebulae and general deep-sky imaging. The useful headline specs are aperture 66 mm, focal length 462 mm, f/7.
Camera coverage: Full frame / APS-C / Micro 4/3. Image circle: 44 mm. Back focus: Built-in field correction; no separate flattener spacing.
Refractors keep the field routine calmer: no regular collimation, predictable cooldown, and a clean path to autofocus and filtered imaging. The tradeoff is aperture and reach.
Best paired with
- Corrected field flattener or reducer when the design requires one
- Cooled APS-C or smaller astro cameras matched to the image circle
- Autofocus, guide scope or OAG, and a mount with comfortable payload margin
Not recommended for
- Large full-frame sensors unless the corrected field supports them
- Very small travel mounts near their realistic imaging payload limit
- Buyers expecting one telescope to be ideal for every target size
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 | $849.00 | In stock Updated 8/5/2026 | View Offer - $849.00 |
Price History
Chronological retailer pricing with out-of-stock points shown at reduced opacity.