telescope
Takahashi
FC-100DL
100mm Apo doublet fluorite · 900mm f/9.0
Long-focus fluorite doublet.
Best for
- Medium-sized galaxies and planetary nebulae
- High-resolution long-exposure work
Specifications
| Optics | |
| Type | refractor |
| Optical design | Apo doublet fluorite |
| Aperture | 100mm |
| Focal length | 900mm |
| Native f/ratio | f/9.0 |
| Image circle | 44mm |
| Full-frame support | No |
| Physical | |
| Weight | 3.3kg |
Typical FOV & image scale
With Full-frame (36×24mm, 3.76µm)
FOV 2.29° × 1.53°
Scale 0.86″/px
With APS-C (23.5×15.7mm, 3.76µm)
FOV 1.50° × 1.00°
Scale 0.86″/px
With IMX533 square (11.3×11.3mm, 3.76µm)
FOV 0.72° × 0.72°
Scale 0.86″/px
Typical targets
- Messier M25 — Open Cluster M25Open Cluster · 32′
- Messier M22 — Great Sagittarius ClusterGlobular Cluster · 32′
- Messier M39 — Open Cluster M39Open Cluster · 32′
- NGC NGC 55 — Sculptor FilamentGalaxy · 32′
- Messier M47 — Open Cluster M47Open Cluster · 30′
- Messier M67 — Open Cluster M67Open Cluster · 30′
Recommended cameras
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