telescopecomparison · 2-way
Takahashi FC-100DZ vs Takahashi TOA-150B
Takahashi
FC-100DZ
Best suited for intermediate imagers building a versatile kit running a portable travel rig.
Takahashi
TOA-150B
Best suited for intermediate imagers building a versatile kit running a permanent observatory setup.
Key differences
-27% focal length
-33% aperture
Slower by 0.7 f-stops
Specifications
| Specification | Takahashi FC-100DZ | Takahashi TOA-150B |
|---|---|---|
| Optics | ||
| Type | refractor | refractor |
| Optical design | Apo doublet fluorite | Apo triplet |
| Aperture | 100mm | 150mm |
| Focal length | 800mm | 1100mm |
| Native f/ratio | f/8.0 | f/7.3 |
| Image circle | 44mm | 88mm |
| Full-frame support | No | Yes |
| Physical | ||
| Weight | 3.3kg | 13.5kg |
Advantages of Takahashi FC-100DZ
- Wider field — 800mm vs 1100mm focal length
- Lighter (3.3kg vs 13.5kg) — easier to travel with
Advantages of Takahashi TOA-150B
- Tighter framing — 1100mm vs 800mm focal length
- 50% more light-gathering aperture
- Faster optics at f/7.3 vs f/8
- Larger image circle (88mm) — supports bigger sensors
Best for — Takahashi FC-100DZ
- Medium-sized galaxies and planetary nebulae
- High-resolution long-exposure work
Best for — Takahashi TOA-150B
- Medium-sized galaxies and planetary nebulae
- Full-frame astro cameras and DSLRs
Takahashi FC-100DZ — 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
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
Takahashi FC-100DZ — recommended user
Best suited for intermediate imagers building a versatile kit running a portable travel rig.
Takahashi TOA-150B — recommended user
Best suited for intermediate imagers building a versatile kit running a permanent observatory setup.