
Sky-Watcher EvoStar 150ED APO Refractor Telescope OTA (S11190)
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 dual-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.
Description
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 150ED comes in a foam-lined aluminum case with tube rings, and a V-style dovetail plate.
Quick Overview
- Doublet apochromatic optical design
- Two-element, air-spaced optical assembly minimizes false color
- 150mm aperture, 1200mm focal length, f/8 focal ratio
- 2-inch dual-speed Crayford-style focuser
What's in the Box
- Aluminum tube coated with glossy, black diamond metal-flake finish
- Tube rings
- V-style dovetail
- Foam-lined aluminum case
Specifications
Optical Info | |
Optical Design | ED Doublet |
Lens Coatings | Fully Multi-Coated |
True Aperture (mm) | 150 |
Primary Aperture (mm) | 150 |
F/Ratio | 8 |
Focal Length (mm) | 120000% |
Observational Info | |
Dawes Limit | 0.77 |
Rayleigh Limit | 0.93 |
Limiting Mag. | 1330% |
Minimum Magnification | 21 |
Maximum Magnification | 29500% |
Light Gathering (compared to next size down) | 71% |
General Info | |
Focuser | 2" Dual Speed Crayford |
OTA Length (Retract/Ext.) | 50.5" |
OTA Outer Diameter | 7.1" |
OTA Weight (with accessories) | 20.5 |
Accessories | |
Mounting Accessories | Rings/V-Rail |
Included Case | Yes |
Corrector | No (optional) |