telescopecomparison · 2-way
TEC APO140FL f/7 vs ZWO FF131 APO
TEC
APO140FL f/7
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.
ZWO
FF131 APO
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.
Key differences
+7% aperture
Faster by 0.5 f-stops
Specifications
| Specification | TEC APO140FL f/7 | ZWO FF131 APO |
|---|---|---|
| Optics | ||
| Type | refractor | refractor |
| Optical design | Apo triplet fluorite | Apo quadruplet ED |
| Aperture | 140mm | 131mm |
| Focal length | 980mm | 983mm |
| Native f/ratio | f/7.0 | f/7.5 |
| Image circle | — | 44mm |
| Full-frame support | No | Yes |
| Physical | ||
| Weight | — | 7.9kg |
Advantages of TEC APO140FL f/7
- Faster optics at f/7 vs f/7.5
Advantages of ZWO FF131 APO
- Larger image circle (44mm) — supports bigger sensors
Best for — TEC APO140FL f/7
- Medium-sized galaxies and planetary nebulae
Best for — ZWO FF131 APO
- Medium-sized galaxies and planetary nebulae
- Full-frame astro cameras and DSLRs
TEC APO140FL f/7 — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 2.10° × 1.40°Scale: 0.79"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 1.37° × 0.92°Scale: 0.79"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 0.66° × 0.66°Scale: 0.79"/px
ZWO FF131 APO — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 2.10° × 1.40°Scale: 0.79"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 1.37° × 0.92°Scale: 0.79"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 0.66° × 0.66°Scale: 0.79"/px
TEC APO140FL f/7 — recommended user
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.
ZWO FF131 APO — recommended user
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.
