telescopecomparison · 2-way
Orion ED80T CF vs Orion 8" f/3.9 Newtonian Astrograph
Orion
8" f/3.9 Newtonian Astrograph
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.
Key differences
-40% focal length
-61% aperture
Slower by 2.1 f-stops
Specifications
| Specification | Orion ED80T CF | Orion 8" f/3.9 Newtonian Astrograph |
|---|---|---|
| Optics | ||
| Type | refractor | newtonian |
| Optical design | Apo triplet carbon fiber | Newtonian astrograph |
| Aperture | 80mm | 203mm |
| Focal length | 480mm | 800mm |
| Native f/ratio | f/6.0 | f/3.9 |
| Image circle | 44mm | — |
| Full-frame support | No | No |
| Physical | ||
| Weight | 3.4kg | 10.5kg |
Advantages of Orion ED80T CF
- Wider field — 480mm vs 800mm focal length
- Larger image circle (44mm) — supports bigger sensors
- Lighter (3.4kg vs 10.5kg) — easier to travel with
Advantages of Orion 8" f/3.9 Newtonian Astrograph
- Tighter framing — 800mm vs 480mm focal length
- 154% more light-gathering aperture
- Faster optics at f/3.9 vs f/6
Best for — Orion ED80T CF
- Large emission nebulae and star clusters
Best for — Orion 8" f/3.9 Newtonian Astrograph
- Medium-sized galaxies and planetary nebulae
- Fast imaging — short exposures per sub
- Faint-object imaging under dark skies
Orion ED80T CF — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 4.30° × 2.86°Scale: 1.62"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 2.81° × 1.87°Scale: 1.62"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 1.35° × 1.35°Scale: 1.62"/px
Orion 8" f/3.9 Newtonian Astrograph — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 2.58° × 1.72°Scale: 0.97"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 1.68° × 1.12°Scale: 0.97"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 0.81° × 0.81°Scale: 0.97"/px
Orion ED80T CF — recommended user
Best suited for beginners and wide-field enthusiasts running a portable travel rig.
Orion 8" f/3.9 Newtonian Astrograph — recommended user
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.