CHF 284
In stock with supplier
Designed specifically for Sky-Watcher Esprit 150 ED and EDX apochromatic spotting scopes, this focal reducer / field corrector 0.77× is a top-of-the-range accessory for demanding astrophotographers who want to optimize field of view, optical speed and star quality right up to the edges of the sensor.
Thanks to its three fully multi-treated lenses, The Esprit 150 ED is a high-performance photographic instrument, thanks to its precise correction of field curvature while reducing focal length.
With a reduction factor of 0,77×, this corrector lowers the telescope's focal ratio Esprit 150 ED at f/5.4, enabling :
The corrected image circle of 36 mm guarantees even illumination and full optical correction up to format APS-C, while remaining full-format compatible with top-level results.
The corrector comes with a M48 adapter offering a standard 55 mm backfocus, perfectly compatible with Sky-Watcher reflex rings:
After removing the adapter, a internal thread M71x1 becomes accessible, allowing customized configurations with a maximum backfocus of 75 mm, ideal for advanced setups
(cooled cameras, filter wheels, optical drawers).
The corrector also accepts filters 2″, This makes it easy to integrate into a modern imaging chain without any mechanical compromises.
| Type | Focal reducer / field corrector |
| Reduction factor | 0,77× |
| Resulting focal ratio | f/5.4 (with Esprit 150 ED) |
| Optical design | 3 lenses, fully multi-treated |
| Corrected image circle | 36 mm |
| Sensor compatibility | APS-C and full-frame |
| Backfocus | 55 mm (with adapter) / 75 mm (without adapter) |
| Threads | M48 × 0.75 (adapter) / M71 × 1 (internal) |
| Filter compatibility | 2″ filters |
| Weight | 910 g (with caps) |
Visit Sky-Watcher 0.77× reducer/corrector for Esprit 150 ED is the essential accessory for fully exploiting the photographic potential of this iconic telescope:
An obvious choice for astrophotographers seeking performance, reliability and optical coherence with Spirit 150 ED.
