Skywatcher EvoStar 120ED Apo Refractor
- 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, and foam-lined aluminum case
Description
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.
Specifications
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 Included Case Yes Corrector No (optional)
