telescopecomparison · 2-way
Askar 120APO vs TS-Optics PHOTOLINE 80 f/6 Triplet APO
Askar
120APO
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.
TS-Optics
PHOTOLINE 80 f/6 Triplet APO
Best suited for beginners and wide-field enthusiasts running a portable travel rig.
Key differences
+75% focal length
+50% aperture
Slower by 1.0 f-stops
Specifications
| Specification | Askar 120APO | TS-Optics PHOTOLINE 80 f/6 Triplet APO |
|---|---|---|
| Optics | ||
| Type | Refractor | refractor |
| Optical design | Triplet APO | Apo triplet FPL-53 |
| Aperture | 120mm | 80mm |
| Focal length | 840mm | 480mm |
| Native f/ratio | f/7.0 | f/6.0 |
| Image circle | 44mm | 44mm |
| Full-frame support | Yes | No |
| Physical | ||
| Weight | 8.5kg | 4.4kg |
Advantages of Askar 120APO
- Tighter framing — 840mm vs 480mm focal length
- 50% more light-gathering aperture
Advantages of TS-Optics PHOTOLINE 80 f/6 Triplet APO
- Wider field — 480mm vs 840mm focal length
- Faster optics at f/6 vs f/7
- Lighter (4.4kg vs 8.5kg) — easier to travel with
Best for — Askar 120APO
- Medium-sized galaxies and planetary nebulae
- Full-frame astro cameras and DSLRs
Best for — TS-Optics PHOTOLINE 80 f/6 Triplet APO
- Large emission nebulae and star clusters
Askar 120APO — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 2.46° × 1.64°Scale: 0.92"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 1.60° × 1.07°Scale: 0.92"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 0.77° × 0.77°Scale: 0.92"/px
TS-Optics PHOTOLINE 80 f/6 Triplet APO — 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
Askar 120APO — recommended user
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.
TS-Optics PHOTOLINE 80 f/6 Triplet APO — recommended user
Best suited for beginners and wide-field enthusiasts running a portable travel rig.