description Astro-Tech AT100EDT Overview
The Astro-Tech AT100EDT is a popular choice for astrophotographers seeking a portable and well-corrected refractor. Its 100mm aperture and f/7.5 focal ratio provide a good balance between light gathering and focal length. A built-in field flattener ensures sharp images across the entire field of view. It's a versatile telescope suitable for a wide range of astrophotography targets, and its compact size makes it easy to transport.
info Astro-Tech AT100EDT Specifications
| Focuser | 2.5-inch Rack and Pinion with 10:1 Reduction |
| Aperture | 100mm |
| Dovetail | Vixen-style |
| Back Focus | 55mm |
| Focal Ratio | f/7.5 |
| Tube Length | 500mm |
| Tube Weight | 3.6kg (8lbs) |
| Finder Scope | Sold separately |
| Focal Length | 750mm |
| Image Circle | 44mm |
| Optical Design | Apochromatic Refractor with ED Glass |
| Field Flattener | Built-in |
| Color Correction | Excellent, minimal chromatic aberration |
balance Astro-Tech AT100EDT Pros & Cons
- Apochromatic ED glass design effectively eliminates chromatic aberration for true color reproduction
- Built-in field flattener provides sharp, distortion-free stars across the entire imaging field without additional accessories
- Portable 100mm aperture and f/7.5 focal ratio offer excellent balance between portability and image quality
- Solid build quality with high-quality Rack and Pinion focuser for smooth adjustments
- 44mm image circle accommodates popular APS-C sized sensors without vignetting
- Excellent for deep sky astrophotography with good color correction and contrast
- 100mm aperture limits light gathering compared to larger apertures for faint deep sky objects
- Premium price point relative to aperture size may not suit budget-conscious beginners
- Does not include a mount, tripod, or finder scope - requires separate purchase
- Limited magnification potential for planetary observation due to modest aperture
- Heavy for a 100mm refractor, requiring a sturdy mount to handle the weight properly
help Astro-Tech AT100EDT FAQ
What is the focal length of the Astro-Tech AT100EDT?
The Astro-Tech AT100EDT has a focal length of 750mm, achieved through its 100mm aperture and f/7.5 focal ratio. This focal length is ideal for capturing many popular deep sky targets including nebulae and galaxies.
Is the Astro-Tech AT100EDT good for astrophotography?
Yes, the AT100EDT excels at astrophotography due to its apochromatic ED glass, built-in field flattener, and 44mm image circle. The f/7.5 focal ratio provides a good compromise between exposure times and field of view for various targets.
What mount do I need for the AT100EDT?
The AT100EDT requires a sturdy equatorial mount with at least 15-20 lbs capacity to properly support the telescope and provide smooth tracking. A mount with goto capabilities is recommended for astrophotography sessions.
Does the Astro-Tech AT100EDT need a field flattener?
No, the AT100EDT includes a built-in field flattener, eliminating the need for a separate accessory. This integrated design ensures optimal performance with APS-C sized sensors while reducing the overall equipment complexity.
What is Astro-Tech AT100EDT?
How good is Astro-Tech AT100EDT?
How much does Astro-Tech AT100EDT cost?
What are the best alternatives to Astro-Tech AT100EDT?
What is Astro-Tech AT100EDT best for?
Intermediate to advanced astrophotographers seeking a portable, well-corrected refractor telescope for capturing high-quality deep sky images without the need for additional field flattening accessories.
How does Astro-Tech AT100EDT compare to ASA Astrograph 65Q?
Is Astro-Tech AT100EDT worth it in 2026?
What are the key specifications of Astro-Tech AT100EDT?
- Focuser: 2.5-inch Rack and Pinion with 10:1 Reduction
- Aperture: 100mm
- Dovetail: Vixen-style
- Back Focus: 55mm
- Focal Ratio: f/7.5
- Tube Length: 500mm
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