Product Overview
The Sky-Watcher Classic Dobsonian Telescope 254mm/1200mm (10") has a "paraboloidal" primary mirror to eliminate spherical aberration and a four-arm, secondary- mirror bracket with fine supports (0.5mm thick), to reduce diffraction spikes and light loss. In addition, this model include a 2" focuser with a 1.25" adapter, allowing the use of either eyepiece size. This model also include the new feature-tension control handle.
Specifications
SKU | S11620 |
UPC | 050234116206 |
Optical Info | |
---|---|
Optical Design | Newtonian |
Mirror Coatings | 94% Aluminum |
Glass Type | Borosilicate |
Primary Aperture (mm) | 254 |
F/Ratio | 4.7 |
Focal Length (mm) | 1200 |
Secondary Diameter | 64mm |
Secondary Obstruction (by diameter) | 25% |
Secondary Obstruction by Area | 6% |
Observational Info | |
Dawes Limit | 0.46 |
Rayleigh Limit | 0.55 |
Limiting Mag. | 14.5 |
Minimum Magnification | 36 |
Maximum Magnification | 500 |
Light Gathering (compared to next size down) | 57% |
General Info | |
Focuser | 2" Crayford |
OTA Length (Retract/Ext.) | 45" |
OTA Outer Diameter | 11.375" |
OTA Weight (with accessories) | 28 |
Dob Base Weight | 25 |
Dob Base Measurements | 29"x20.5" |
Zenith Eyepiece Height | 48" |
Accessories | |
Included Finder | 9x50 Finder |
Included Diagonal | No |
Included Eyepieces | 25/10 Super (modified Kellner) |
Magnification w/ Included Eyepieces | 48x/120x |
Included Case | No |
Corrector | No |