Sky-Watcher Evostar EDX 100mm APO Doublet
The Evostar-100ED apochromatic doublet refractor has received some exciting mechanical upgrades as well as an optical redesign. We are pleased to introduce the new EVOSTAR-100EDX model, which is the result of several very useful mechanical improvements, and a change in its focal ratio from f/9 to a much faster and more imaging-friendly f/7. Presented in its stunning new white and green livery, the EVOSTAR-100EDX is a superb instrument for both imaging and visual use, with the necessary accessories.
The new EVOSTAR-100EDX model includes an enlarged 2.8” indexed focuser drawtube with a built-in 360° rotatable adaptor, a retractable dew shield and a convenient carrying handle.
Now featuring f/7 matched optics including one premium Japanese Ohara FPL-53 ED glass lens element which virtually eliminates chromatic aberration. An optional optically matched 0.92x Focal Reducer/Field Flattener (code 20332) is available for imaging.
The optics deliver tack-sharp stars with charcoal-black, contrast-rich skies. Each air-to-glass lens surface has exotic anti-reflection metallic coatings applied, to ensure optimum light throughput of approaching 99.5%!! The proprietary Sky-Watcher “Metallic High-Transmission Coatings” (MHTC) are the finest photon anti-rejection coatings in their class.
Apochromatic Refractors, due to their unobstructed, text-book like diffraction patterns, produce the sharpest, highest quality optical imaging available, bar-none, aperture for aperture, of any telescope optical system.
For a long time, Evostar-ED doublets have been the imaging refractors of choice for many astrophotographers due to the combination of their excellent imaging performance and affordability. Due to less glass in their construction, they are also usually much lighter weight and more convenient to handle than an equivalent aperture triplet or other multi-element ED refractor designs.
Please note: Supplied without eyepiece, star diagonal & finderscope.
Technical Specifications
| Category |
Specification |
| Optics |
|
| Objective Lens Diameter |
100 mm |
| Telescope Focal Length |
700 mm (f/7) |
| Objective Design |
Multi-Coated Objective Lens (MHTC coatings) |
| Highest Practical Power |
x300 |
| Image Height |
40 mm (with optional reducer/flattener) |
| Focuser |
|
| Focuser Type |
Dual-Speed 11:1 2" Crayford (backlash-free) |
| Drawtube Size |
2.8" Indexed |
| Rotation |
360º rotatable adaptor |
| Mechanical Features |
|
| Dew Shield |
Retractable |
| Tube Material |
Aluminium OTA with internal baffling |
| Tube Rings |
Tube rings with carrying handle |
| Dovetail Bar |
45 mm |
| Finderscope Mount |
Compatible with all Sky-Watcher finderscopes |
| Diagonal Compatibility |
Accepts 2" star diagonal |
| Dimensions & Weight |
|
| OTA Length (Retracted) |
570 mm |
| OTA Length (Extended) |
675 mm |
| Weight (OTA) |
5.5 kg |
| Included Accessories |
|
| Carrying Case |
Aluminium carrying case |
In the Box
- Telescope tube
- Losmandy-D type Dovetail
- Mounting Case
Warranty & Manuals
Sky-Watcher 2-Year Warranty