Sky-Watcher Evostar 100 Doublet APO
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.
- 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
Technical 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) |
In the Box
- Sky-Watcher Evostar 100 Doublet APO
- 2 x 1.25" Eyepieces (5mm and 25mm)
- 2" Crayford-style focuser
- Tube rings
- V-style dovetail
- 8x50 Right-angle Finderscope,
- 2" Dielectric Diagonal
- Aluminum case
Warranty & Manuals
Sky-Watcher 2-Year Warranty
