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
- Messier M33 — Triangulum GalaxyGalaxy · 73′
- IC IC 2944 — Running Chicken NebulaEmission Nebula · 75′
- IC IC 434 — Horsehead NebulaEmission Nebula · 60′
- NGC NGC 869/884 — Double ClusterOpen Cluster · 60′
- NGC NGC 2264 — Christmas Tree ClusterEmission Nebula · 60′
- NGC NGC 6992 — Eastern VeilSupernova Remnant · 60′
Recommended cameras
28.4mm sensor · 4.78µm px · cooled
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Compare pairing28.3mm sensor · 3.76µm px · cooled
Compare pairing