Esprit 80ED, 100ED, 120ED and 150ED Super APO refractors have a doublet field flattener to get a flat field and minimize aberration and distortion. Their M48 adapter for cameras assure larger clear aperture than M42 adapter to reduce halation as much as possible. Connect the triplet and doublet field flattener with a high precision thin thread to keep the optical axis perpendicular to the image.
Sky-Watcher has a passion to produce some of the finest optics to capture the
night sky. In 2010, Sky-Watcher announced a pair of ED triplet apochromatic
refractors, the 150mm, and it's smaller but very capable brother, the 120mm. To
add to this exciting line, Sky-Watcher introduces the new 100mm ED triplet APO
The Esprit 100mm is the third-largest Apochromatic refractor made by
Sky-Watcher. This formidable instrument produces razor-sharp, false color-free
views, highly suitable for astrophotography and visual observing. Our comparison
with a high priced competitors scope was a draw.
Sky-Watcher's new 2.7" dual-speed linear power roller bearing focuser is
tough enough to drive heavy accessories with virtually no slippage. Unlike
traditional Crayford focusers which surround the drawtube with roller bearings,
the linear power focuser places the bearings along a single metal track mounted
along the drawtube, so the drawtube is never flexed or placed under
The locking mechanism of the linear power focuser improves on the Crayford
design, by retaining the desired focus, with no flexure or bending of the
drawtube. An engraved linear scale helps set the focus close to where you need
The focus knobs can be rotated to change their orientation to suit the user.
A built-in camera angle adjuster means easy and precise rotation of the camera
and star diagonal independent of the focus knobs.
Apochromatic refractors have somewhat of a cult following; they are
considered the finest instrument to observe and photograph the skies. Once
relegated to a price range affordable by those drowning in money, they now swim
in the shallow end.Main Features:
- Premium optical materials
- Short focal length and full frame corrected focal plane
- Excellent field flatness
- Precision linear power focuser is standard
- Metallic high-transmission lens coatings
- Light-baffled optical systems
- Telescope tube attachment hardware