Astro-Tech AT125EDL
Astro-Tech
Astro-Tech AT125EDL is a 125 mm Premium ED doublet refractor for deeper refractor imaging, smaller galaxies, and high-quality visual observing.
Best Current Offer
Specifications
Optics
- Optical design
- Premium ED doublet refractor
- Aperture
- 125 mm
- Focal length
- 975 mm
- Focal ratio
- f/7.8
- Dawes limit
- 0.93"
- Glass / elements
- FCD-100 and lanthanum ED doublet
Imaging
- Camera format
- APS-C / Micro 4/3 with matching flattener
- Full-frame coverage
- No
- Back focus
- Requires field flattener/reducer spacing for imaging
Specifications
- Weight
- 12.3 lb (5.58 kg)
Mechanical
- Focuser
- Dual-speed rack-and-pinion focuser
Astrophotography Fit
Best for deeper refractor imaging, smaller galaxies, and high-quality visual observing when the mount, camera format, and correction hardware are chosen as one system.
Astro-Tech AT125EDL sits in the telescope slot for deeper refractor imaging, smaller galaxies, and high-quality visual observing. The useful headline specs are aperture 125 mm, focal length 975 mm, f/7.8.
Camera coverage: APS-C / Micro 4/3 with matching flattener. Back focus: Requires field flattener/reducer spacing for imaging.
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 | $1,699.00 | Out of stock Updated 8/5/2026 | View Offer - $1,699.00 |
Price History
Chronological retailer pricing with out-of-stock points shown at reduced opacity.