telescopecomparison · 2-way
TEC APO140FL f/9.6 vs Takahashi TOA-150B
TEC
APO140FL f/9.6
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.
Takahashi
TOA-150B
Best suited for intermediate imagers building a versatile kit running a permanent observatory setup.
Key differences
+22% focal length
-7% aperture
Slower by 2.3 f-stops
Specifications
| Specification | TEC APO140FL f/9.6 | Takahashi TOA-150B |
|---|---|---|
| Optics | ||
| Type | refractor | refractor |
| Optical design | Apo triplet fluorite | Apo triplet |
| Aperture | 140mm | 150mm |
| Focal length | 1345mm | 1100mm |
| Native f/ratio | f/9.6 | f/7.3 |
| Image circle | — | 88mm |
| Full-frame support | No | Yes |
| Physical | ||
| Weight | 7.7kg | 13.5kg |
Advantages of TEC APO140FL f/9.6
- Tighter framing — 1345mm vs 1100mm focal length
- Lighter (7.7kg vs 13.5kg) — easier to travel with
Advantages of Takahashi TOA-150B
- Wider field — 1100mm vs 1345mm focal length
- Faster optics at f/7.3 vs f/9.6
- Larger image circle (88mm) — supports bigger sensors
Best for — TEC APO140FL f/9.6
- Small galaxies, planetary nebulae, lunar & planetary detail
- High-resolution long-exposure work
Best for — Takahashi TOA-150B
- Medium-sized galaxies and planetary nebulae
- Full-frame astro cameras and DSLRs
TEC APO140FL f/9.6 — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 1.53° × 1.02°Scale: 0.58"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 1.00° × 0.67°Scale: 0.58"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 0.48° × 0.48°Scale: 0.58"/px
Takahashi TOA-150B — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 1.88° × 1.25°Scale: 0.71"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 1.22° × 0.82°Scale: 0.71"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 0.59° × 0.59°Scale: 0.71"/px
TEC APO140FL f/9.6 — recommended user
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.
Takahashi TOA-150B — recommended user
Best suited for intermediate imagers building a versatile kit running a permanent observatory setup.
