Sky-Watcher SKU: S11170 | Helix SKU: CTS11170
Sky-Watcher Evostar refractors provide the finest images obtainable in their design class. These doublet refractors deliver dramatic, coal-black skies and faithful, contrast-rich views of planetary and deep-space phenomenon that are second to none. Sky-Watcher Evostar refractors are the logical choice for the discriminating amateur astronomer looking for an investment in advanced instrumentation for exceptional viewing and astrophotography.
Specifications:
Optical Info | |
---|---|
Optical Design | ED Doublet |
Lens Coatings | Fully Multi-Coated |
True Aperture (mm) | 50 |
Primary Aperture (mm) | 50 |
F/Ratio | 4.8 |
Focal Length (mm) | 242 |
Observational Info | |
Dawes Limit | 2.32 |
Rayleigh Limit | 2.79 |
Limiting Mag. | 11 |
Minimum Magnification | 9 |
Maximum Magnification | 98 |
General Info | |
Focuser | 1.25" Helical |
OTA Length (Retract/Ext.) | 10.5" |
OTA Outer Diameter | 2.2" |
OTA Weight (with accessories) | 1.9 |
Accessories | |
Mounting Accessories | Guide Rings |
Included Case | No |
Corrector | No |