Astro-Tech AT115EDT
Astro-Tech
Astro-Tech AT115EDT is a 115 mm ED triplet APO refractor for general deep-sky imaging and visual observing.
Best Current Offer
Specifications
Optics
- Optical design
- ED triplet APO refractor
- Aperture
- 115 mm
- Focal length
- 805 mm
- Focal ratio
- f/7
- Dawes limit
- 1.01"
- Glass / elements
- Air-spaced ED triplet objective
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
- 15.25 lb (6.92 kg)
Mechanical
- Focuser
- Dual-speed rack-and-pinion focuser
Astrophotography Fit
Best for general deep-sky imaging and visual observing when the mount, camera format, and correction hardware are chosen as one system.
Astro-Tech AT115EDT sits in the telescope slot for general deep-sky imaging and visual observing. The useful headline specs are aperture 115 mm, focal length 805 mm, f/7.
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 | $1,299.00 | In stock Updated 5/14/2026 | View Offer - $1,299.00 |