telescope
TS-Optics
UNC 254 f/4 Newtonian Astrograph
254mm Newtonian astrograph · 1016mm f/4.0
Fast imaging Newtonian.
Best for
- Medium-sized galaxies and planetary nebulae
- Fast imaging — short exposures per sub
- Faint-object imaging under dark skies
- Full-frame astro cameras and DSLRs
Specifications
| Optics | |
| Type | newtonian |
| Optical design | Newtonian astrograph |
| Aperture | 254mm |
| Focal length | 1016mm |
| Native f/ratio | f/4.0 |
| Image circle | — |
| Full-frame support | Yes |
| Physical | |
| Weight | 14.0kg |
Typical FOV & image scale
With Full-frame (36×24mm, 3.76µm)
FOV 2.03° × 1.35°
Scale 0.76″/px
With APS-C (23.5×15.7mm, 3.76µm)
FOV 1.33° × 0.89°
Scale 0.76″/px
With IMX533 square (11.3×11.3mm, 3.76µm)
FOV 0.64° × 0.64°
Scale 0.76″/px
Typical targets
- Messier M20 — Trifid NebulaEmission Nebula · 28′
- Messier M35 — Open Cluster M35Open Cluster · 28′
- Messier M23 — Open Cluster M23Open Cluster · 27′
- Messier M46 — Open Cluster M46Open Cluster · 27′
- NGC NGC 253 — Sculptor GalaxyGalaxy · 27′
- Messier M81 — Bode's GalaxyGalaxy · 26.9′
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