telescopecomparison · 2-way
Askar 71F vs TS-Optics PHOTOLINE 80 f/6 Triplet APO
TS-Optics
PHOTOLINE 80 f/6 Triplet APO
Best suited for beginners and wide-field enthusiasts running a portable travel rig.
Key differences
-11% aperture
Slower by 0.9 f-stops
Specifications
| Specification | Askar 71F | TS-Optics PHOTOLINE 80 f/6 Triplet APO |
|---|---|---|
| Optics | ||
| Type | refractor | refractor |
| Optical design | Petzval quintuplet FPL-51 | Apo triplet FPL-53 |
| Aperture | 71mm | 80mm |
| Focal length | 490mm | 480mm |
| Native f/ratio | f/6.9 | f/6.0 |
| Image circle | 44mm | 44mm |
| Full-frame support | Yes | No |
| Physical | ||
| Weight | 3.2kg | 4.4kg |
Advantages of Askar 71F
- Lighter (3.2kg vs 4.4kg) — easier to travel with
Advantages of TS-Optics PHOTOLINE 80 f/6 Triplet APO
- 13% more light-gathering aperture
- Faster optics at f/6 vs f/6.9
Best for — Askar 71F
- Large emission nebulae and star clusters
- Full-frame astro cameras and DSLRs
Best for — TS-Optics PHOTOLINE 80 f/6 Triplet APO
- Large emission nebulae and star clusters
Askar 71F — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 4.21° × 2.81°Scale: 1.58"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 2.75° × 1.84°Scale: 1.58"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 1.32° × 1.32°Scale: 1.58"/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 71F — recommended user
Best suited for beginners and wide-field enthusiasts running a portable travel rig.
TS-Optics PHOTOLINE 80 f/6 Triplet APO — recommended user
Best suited for beginners and wide-field enthusiasts running a portable travel rig.