130mm f/2.8 HNT
Sharpstar
~$1,563.93
1 stores
In stock
The Sharpstar 130mm f/2.8 HNT is a premium hyperbolic Newtonian astrograph engineered for fast, efficient wide-field astrophotography. With its ultra-fast f/2.8 focal ratio, this reflector captures large nebulae, galaxies, and star fields while requiring roughly half the exposure time of equivalent f/4 systems. The instrument features a hyperbolic primary mirror with 97% reflective aluminum coatings and a two-element ED corrector, delivering sharp, flat images across a generous 44mm image circle suitable for full-frame digital sensors.
Specifications
| Image Circle | 44 mm |
| Tube Material | Aluminum |
| Focal length | 364 mm |
| Primary Mirror Material | PZ33 glass |
| Tube Length | 15.7 mm |
| Focal ratio | f/2.8 |
| Mirror Reflectivity | 97% |
| Focuser Type | 2.5 inch rack and pinion |
| Field of View | 6.9° |
| Secondary Mirror Minor Axis | 65 mm |
| Corrector | Two-element air-spaced ED doublet |
| Aperture | 130 mm |
| Primary Mirror Type | Hyperbolic reflector |
| Tube Outer Diameter | 174 in |