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.
Scope of Delivery:
- ED 100/700 mm with dual-speed Crayford focuser
- Tube rings with handle
- Dovetail bar
- Aluminum case
| Aperture: | 100 mm |
| Focal length: | 700 mm |
| Focal ratio: | f/7 |
| ED glass: | S-FPL53 (Ohara, Japan) and Schott crown glass |
| Coating: | "Metallic High-Transmission Coatings" (MHTC) on all glass-air surfaces |
| Visual limiting magnification: | 12m7 |
| Resolution: | 1.15" |
| Focuser: | 2.8" Crayford with 1/11 speed reduction and 2" adapter |
| Connection thread for correctors: | M56x1 external thread |
| Focusing scale: | yes |
| Rotation mechanism: | yes, 360° |
| Finder shoe: | Vixen standard |
| Tube rings: | with handle |
| Dovetail bar: | Vixen style |
| Tube length: | 570 mm (dew shield retracted), 675 mm (dew shield extended) |
| Tube weight: | 5.5 kg |
