Skywatcher EvoStar 100ED Apo Refractor
- Doublet apochromatic optical design
- Two-element, air-spaced optical assembly minimizes false color
- 100mm aperture, 900mm focal length, f/9 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 triple-baffles 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 100ED 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) 100 Primary Aperture (mm) 100 F/Ratio 9 Focal Length (mm) 900 Observational Info Dawes Limit 1.16 Rayleigh Limit 1.4 Limiting Mag. 12.5 Minimum Magnification 14 Maximum Magnification 197 Light Gathering (compared to next size down) 56% General Info Focuser 2" Dual Speed Crayford OTA Length (Retract/Ext.) 34" OTA Outer Diameter 4.5625" OTA Weight (with accessories) 8.4 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)
