Sky-Watcher Esprit 100ED APO Triplet
Product Features
The Esprit 80ED, 100ED, 120ED, and 150ED Super APO refractors are designed for astrophotographers who demand uncompromising image quality. Each telescope is equipped with a dedicated doublet field flattener, delivering a perfectly flat field with minimal distortion and aberrations. The wide 48mm opening ensures bright, sharp images across the frame while suppressing halation to the lowest level.
The flattener is connected to the triplet optics using a high-precision thin-thread system, maintaining strict optical alignment and keeping the axis perfectly perpendicular to the imaging plane. This guarantees reliable performance even on full-frame sensors.
Main Features
➜ Premium-grade optical glass for maximum clarity
➜ Short focal length with full-frame corrected field
➜ Outstanding field flatness for edge-to-edge sharpness
➜ Precision linear power focuser included as standard
➜ High-transmission metallic coatings on all lenses
➜ Zero visible chromatic aberration, even on bright stars
➜ Knife-edge baffled optical system for superior contrast
➜ Robust tube rings and attachment hardware provided
Technical Specifications 
| Specification |
Details |
| Optical Design |
Apochromatic Refractor |
| Optical Diameter |
100mm |
| Focal Length |
550mm |
| Focal Ratio |
f/5.5 |
| Highest Practical Power |
150x |
| Finder Scope |
8x50 Right Angle Erect Finder |
| Focuser Diameter |
3" Linear Power Focuser |
| Diagonal |
2" 90° Dielectric Diagonal with 1.25" Adapter |
| Tube Weight |
6.3 kg |
| Tube Dimensions |
10.5 cm × 47 cm |
| Shipping Weight |
23 kg |
| Shipping Dimensions |
105 × 39 × 29 cm³ |