telescopecomparison · 2-way
Takahashi FC-100DZ vs SharpStar 100QII
Takahashi
FC-100DZ
Best suited for intermediate imagers building a versatile kit running a portable travel rig.
SharpStar
100QII
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.
Key differences
+45% focal length
Slower by 2.5 f-stops
Specifications
| Specification | Takahashi FC-100DZ | SharpStar 100QII |
|---|---|---|
| Optics | ||
| Type | refractor | refractor |
| Optical design | Apo doublet fluorite | Quadruplet astrograph |
| Aperture | 100mm | 100mm |
| Focal length | 800mm | 550mm |
| Native f/ratio | f/8.0 | f/5.5 |
| Image circle | 44mm | 44mm |
| Full-frame support | No | Yes |
| Physical | ||
| Weight | 3.3kg | 5.5kg |
Advantages of Takahashi FC-100DZ
- Tighter framing — 800mm vs 550mm focal length
- Lighter (3.3kg vs 5.5kg) — easier to travel with
Advantages of SharpStar 100QII
- Wider field — 550mm vs 800mm focal length
- Faster optics at f/5.5 vs f/8
Best for — Takahashi FC-100DZ
- Medium-sized galaxies and planetary nebulae
- High-resolution long-exposure work
Best for — SharpStar 100QII
- Large emission nebulae and star clusters
- 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
SharpStar 100QII — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 3.75° × 2.50°Scale: 1.41"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 2.45° × 1.64°Scale: 1.41"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 1.18° × 1.18°Scale: 1.41"/px
Takahashi FC-100DZ — recommended user
Best suited for intermediate imagers building a versatile kit running a portable travel rig.
SharpStar 100QII — recommended user
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.