Description
The AT106EDQ is the mid-size quad in the Astro-Tech EDQ line 106mm of aperture at 742mm f/7 with a built-in ED field flattener that delivers round stars across full-frame sensors without an external corrector. For imagers, it means a shorter, simpler optical train and one less thing to get wrong on setup night. For visual observers, it means 106mm of clean refractor aperture with a flat field that makes wide-field sweeping and open clusters look the way they should. At 14.33 pounds, it rides comfortably on the mounts most amateur imagers already own. Add the 0.8 reducer and you have two focal lengths in one scope f/7 for image scale, f/5.6 for speed. If you want a refractor that images flat out of the box, doesn’t demand a heavy mount, and sits at a price point between the compact AT86EDQ and the full-aperture AT126EDQ, the AT106EDQ is the one that balances all three.
Tech Details:
| Model | Astro-Tech AT106EDQ |
| Optical Design | Quadruplet (4 lens / 2 group) with built-in ED field flattener |
| Aperture | 106mm (4.17″) |
| Focal Length | 742mm |
| Focal Ratio | f/7 |
| ED Elements | 2 (one in triplet objective, one in field flattener group) |
| Corrected Image Circle | 44mm (full frame and smaller) |
| Coatings | Fully multicoated on all air-to-glass surfaces |
| Resolution (Dawes Limit) | 1.3 arc seconds |
| Visual Limiting Magnitude | 12.83 |
| Highest Useful Magnification | 169 |
| Focuser | 3.2″ dual-speed rack-and-pinion, 10:1 fine focus ratio |
| Focuser Threads | M63, M54, M48 |
| Camera Angle Adjuster | Built-in, 360 rotation with locking knob |
| Accessory Holders | 2″ and 1.25″ with non-marring brass compression rings |
| Dew Shield | Retractable (self-storing) |
| OTA Length (retracted) | 23.6″ |
| OTA Length (extended) | 29.3″ |
| Weight (with rings, dovetail, handle) | 14.33 lbs |
| Heaviest Single Component | 12.6 lbs |
| Tube Finish | Matte black anodize with black and red appointments |
| Mounting Rings | Felt-lined hinged split rings with M61 mounting holes |
| Dovetail | Vixen-style (Losmandy D-plate compatible via mounting holes) |
| Compatible Reducer | ATEDQR 0.8 (742mm f/7 ~594mm f/5.6) |
| Warranty | 1 year |
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