telescope
William Optics
Ultra-Cat 76
76mm Petzval (5-element advanced) · 365mm f/4.8
Full-frame Petzval astrograph.
Check Current Price
Affiliate link. AstroPhotoGuru may earn a commission at no additional cost to you. Link for William Optics Ultra-Cat 76.
Product specifications can change. Please verify specifications and compatibility with the manufacturer or retailer before purchasing.
Best for
- Large emission nebulae and star clusters
- Fast imaging — short exposures per sub
- Full-frame astro cameras and DSLRs
Specifications
| Optics | |
| Type | refractor |
| Optical design | Petzval (5-element advanced) |
| Aperture | 76mm |
| Focal length | 365mm |
| Native f/ratio | f/4.8 |
| Image circle | 50mm |
| Full-frame support | Yes |
| Physical | |
| Weight | 3.8kg |
Typical FOV & image scale
With Full-frame (36×24mm, 3.76µm)
FOV 5.65° × 3.77°
Scale 2.12″/px
With APS-C (23.5×15.7mm, 3.76µm)
FOV 3.69° × 2.46°
Scale 2.12″/px
With IMX533 square (11.3×11.3mm, 3.76µm)
FOV 1.77° × 1.77°
Scale 2.12″/px
Typical targets
- IC 2944 — Running Chicken NebulaEmission Nebula · 75′Plan this target
- IC 5070 — Pelican NebulaEmission Nebula · 80′Plan this target
- NGC 2237 — Rosette NebulaEmission Nebula · 80′Plan this target
- M7 — Ptolemy's ClusterOpen Cluster · 80′Plan this target
- M33 — Triangulum GalaxyGalaxy · 73′Plan this target
- M42 — Orion NebulaEmission Nebula · 85′Plan this target
Recommended cameras
Compare with similar
Source: williamoptics.com