telescope
Radian
Raptor 61
61mm Petzval quadruplet · 275mm f/4.5
Fast compact quadruplet.
Best for
- Wide-field nebulae and Milky Way regions
- Fast imaging — short exposures per sub
Specifications
| Optics | |
| Type | refractor |
| Optical design | Petzval quadruplet |
| Aperture | 61mm |
| Focal length | 275mm |
| Native f/ratio | f/4.5 |
| Image circle | 44mm |
| Full-frame support | No |
| Physical | |
| Weight | 2.6kg |
Typical FOV & image scale
With Full-frame (36×24mm, 3.76µm)
FOV 7.50° × 5.00°
Scale 2.82″/px
With APS-C (23.5×15.7mm, 3.76µm)
FOV 4.90° × 3.27°
Scale 2.82″/px
With IMX533 square (11.3×11.3mm, 3.76µm)
FOV 2.35° × 2.35°
Scale 2.82″/px
Typical targets
- IC 2602 — Southern PleiadesOpen Cluster · 100′Plan this target
- M45 — PleiadesReflection Nebula · 110′Plan this target
- M44 — Beehive ClusterOpen Cluster · 95′Plan this target
- M8 — Lagoon NebulaEmission Nebula · 90′Plan this target
- M24 — Sagittarius Star CloudOpen Cluster · 90′Plan this target
- IC 4628 — Prawn NebulaEmission Nebula · 90′Plan this target
