Evostar 120EDX — 120/900 ED doublet The Evostar 120EDX is the upgraded 120 mm ED doublet with a 900 mm focal length at f/7.5. It combines a low-dispersion objective with MHTC coatings for imaging and visual astronomy.
Manufacturer model: Evostar 120EDX — 120/900 ED doublet · Specifications checked against manufacturer data on 2026-11-04
The Evostar 120EDX is the upgraded 120 mm ED doublet with a 900 mm focal length at f/7.5. It combines a low-dispersion objective with MHTC coatings for imaging and visual astronomy.
The 2-inch Crayford focuser has 11:1 fine adjustment and a 2.8-inch indexed drawtube. Its 360° rotatable adapter allows the camera angle to be adjusted for framing. A 2-inch visual adapter accepts a suitable diagonal.
The internally baffled aluminium tube has a retractable dew shield, rings with a carrying handle and a 45 mm-wide mounting bar. Length is 774 mm retracted and 848 mm extended; OTA weight is 6.74 kg.
The matched 0.85× (20234) reducer/flattener is optional. Sky-Watcher specifies 44 mm image height with that corrector fitted. An aluminium carrying case is supplied; eyepiece, star diagonal and finderscope are not included.
Sky-Watcher manufacturer documentation
Exact named manufacturer model checked. Unpublished measurements and unlisted accessories are not inferred.
| Optional reducer flattener | 0.85× (20234) |
|---|---|
| Corrected image height (mm) | 44 |
| Corrected field condition | With the specified optional reducer/flattener |
| Highest potential magnification | 360 |
Ficha técnica
Evostar 120EDX — 120/900 ED doublet The Evostar 120EDX is the upgraded 120 mm ED doublet with a 900 mm focal length at f/7.5. It combines a low-dispersion objective with MHTC coatings for imaging and visual astronomy.
Manufacturer model: Evostar 120EDX — 120/900 ED doublet · Specifications checked against manufacturer data on 2026-11-04
