telescope
Radian
Raptor 75
75mm Petzval quintuplet · 405mm f/5.4
Flat-field quintuplet.
Best for
- Large emission nebulae and star clusters
- Full-frame astro cameras and DSLRs
Specifications
| Optics | |
| Type | refractor |
| Optical design | Petzval quintuplet |
| Aperture | 75mm |
| Focal length | 405mm |
| Native f/ratio | f/5.4 |
| Image circle | 44mm |
| Full-frame support | Yes |
| Physical | |
| Weight | 4.5kg |
Typical FOV & image scale
With Full-frame (36×24mm, 3.76µm)
FOV 5.09° × 3.40°
Scale 1.91″/px
With APS-C (23.5×15.7mm, 3.76µm)
FOV 3.32° × 2.22°
Scale 1.91″/px
With IMX533 square (11.3×11.3mm, 3.76µm)
FOV 1.60° × 1.60°
Scale 1.91″/px
Typical targets
- M33 — Triangulum GalaxyGalaxy · 73′Plan this target
- IC 2944 — Running Chicken NebulaEmission Nebula · 75′Plan this target
- IC 434 — Horsehead NebulaEmission Nebula · 60′Plan this target
- NGC 2264 — Christmas Tree ClusterEmission Nebula · 60′Plan this target
- NGC 6992 — Eastern VeilSupernova Remnant · 60′Plan this target
- NGC 7822 — Cepheus HII RegionEmission Nebula · 60′Plan this target
