telescope
Askar
65PHQ
65mm Quintuplet Petzval · 416mm f/6.4
Flat-field quintuplet Petzval astrograph; supports full-frame imaging.
Best for
- Large emission nebulae and star clusters
- Full-frame astro cameras and DSLRs
Specifications
| Optics | |
| Type | Refractor |
| Optical design | Quintuplet Petzval |
| Aperture | 65mm |
| Focal length | 416mm |
| Native f/ratio | f/6.4 |
| Image circle | 44mm |
| Full-frame support | Yes |
| Physical | |
| Weight | 3.6kg |
Typical FOV & image scale
With Full-frame (36×24mm, 3.76µm)
FOV 4.96° × 3.31°
Scale 1.86″/px
With APS-C (23.5×15.7mm, 3.76µm)
FOV 3.24° × 2.16°
Scale 1.86″/px
With IMX533 square (11.3×11.3mm, 3.76µm)
FOV 1.56° × 1.56°
Scale 1.86″/px
Recommended accessories
- Askar ASKAR 0.7x Reducer for 65PHQreducer · 0.7× focal lengthmanufacturer supported
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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Source: www.askarlens.com