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Product details
- SKU OPENBX120603
Skywatcher EvoStar 120ED Apo Refractor With Hard Case (OPEN BOX)
- Doublet apochromatic optical design
- Two-element, air-spaced optical assembly minimizes false color
- 120mm aperture, 900mm focal length, f/7.5 focal ratio
- 2-inch dual-speed Crayford-style focuser
- Aluminum tube coated with glossy, black diamond metal-flake finish
- Included accessories: two 1.25-inch eyepieces (5mm and 25mm), 2-inch Crayford-style focuser, tube rings, V-style dovetail, 8x50 right-angle finderscope, 2-inch dielectric diagonal
Sky-Watcher’s Evostar apochromatic doublet refractors are the perfect blend of superior extra-low dispersion glass and affordability. The Evostar refractor lens assembly utilizes a proprietary combination of matched lenses, delivering tack-sharp stars with charcoal-black, contrast-rich skies. All ED glass elements are fluorite-based and feature our proprietary Metallic High-Transmission Coatings™ (MHTC™), virtually eliminating all false color while internal baffle prevent stray light from affecting your photography. Like the optics, the tube is beautifully crafted using aluminum and finished with a black diamond metal-flake finish.
Using a doublet refractor instead of a triplet has some advantages: less glass means less weight, less weight means a less expensive telescope, so you can dedicate more money for your camera or laptop while benefiting from a lightweight astrophotography rig.
The Evostar 120ED comes in a foam-lined aluminum case fully loaded with accessories, including: 2-inch Crayford-style focuser, 2-inch dielectric diagonal, two 1.25-inch eyepieces (5mm and 25mm), an 8x50 right-angle finderscope, tube rings, and a V-style dovetail.
KU | S11130 |
UPC | 050234111300 |
Optical Info | |
---|---|
Optical Design | ED Doublet |
Lens Coatings | Fully Multi-Coated |
Glass Type | BK7/FPL-53(ED) |
True Aperture (mm) | 120.5 |
Primary Aperture (mm) | 120 |
F/Ratio | 7.5 |
Focal Length (mm) | 900 |
Observational Info | |
Dawes Limit | 0.97 |
Rayleigh Limit | 1.16 |
Limiting Mag. | 12.9 |
Minimum Magnification | 17 |
Maximum Magnification | 236 |
Light Gathering (compared to next size down) | 44% |
General Info | |
Focuser | 2" Dual Speed Crayford |
OTA Length (Retract/Ext.) | 36" |
OTA Outer Diameter | 5.625" |
OTA Weight (with accessories) | 13.9 |
Accessories | |
Included Finder | 8x50 RACI |
Included Diagonal | 2" Dielectric |
Mounting Accessories | Rings/V-Rail |
Included Eyepieces | 25mm LET/5 Planetary |
Magnification w/ Included Eyepieces | 45x/180x |
Corrector | No (optional) |