Sky-Watcher SKU: S11530 | Helix SKU: CTS11530
SKU | S11530 |
UPC | 050234115308 |
Optical Info | |
---|---|
Optical Design | Mak-Cass |
Mirror Coatings | 94% Aluminum |
Lens Coatings | Fully Multi-Coated |
Glass Type | BK7/Borosilicate |
True Aperture (mm) | 151 |
Primary Aperture (mm) | 166 |
Primary Edge Thickness | 12.5mm |
F/Ratio | 12 |
Focal Length (mm) | 1800 |
Secondary Diameter | 47mm |
Secondary Obstruction (by diameter) | 31% |
Secondary Obstruction by Area | 10% |
Observational Info | |
Dawes Limit | 0.77 |
Rayleigh Limit | 0.93 |
Limiting Mag. | 13.4 |
Minimum Magnification | 21 |
Maximum Magnification | 295 |
Light Gathering (compared to next size down) | 40% |
General Info | |
Focuser | Primary Mirror |
OTA Length (Retract/Ext.) | 17.5" |
OTA Outer Diameter | 7.5" |
OTA Weight (with accessories) | 14 |
Accessories | |
Included Finder | 9x50 Finder |
Included Diagonal | 2" Star Diagonal |
Mounting Accessories | V-Rail |
Included Eyepieces | 28 LET |
Magnification w/ Included Eyepieces | 64.3x |
Included Case | No |
Corrector | No |