Sky-Watcher 0.77x Reducer/Field Flattener for Evostar 150DX
Sky-Watcher has discontinued the 0.77x Reducer/Field Flattener for Esprit 150DX, and we are out of stock. Here is a link to the astrophotography optical accessories we carry at High Point. Hopefully, you can find a proper replacement in this selection. If we can be of further assistance, please don't hesitate to call us at 1-800-266-9590 or send an email, and we will be happy to help you. Thank you!
Sky-Watcher 0.77x Reducer/Field Flattener
for Esprit 150DX
This Sky-Watcher 0.77x reducer and field flattener is designed for the Evostar 150DX APO refractor. Slipping into the telescope's focuser, this reducer/field flattener boasts a number of features:
- Reduces exposure time by 66% compared to the Evostar 150DX's native f/8
- Reduces the focal ratio from f/8 (1200 mm) to f/6.2 (930 mm)
- 89 mm back-focus (55 mm with spacer and M48 ring installed)
- 34 mm fully illuminated field
- Compatible with APS-C and full-frame sensors
- APS-C field of view: 1.45 x 0.97-degrees
- Full-frame field of view: 2.22 x 1.48-degrees
- Built-in 2-inch filter cell for mounting filters into light path
Only compatible with the Evostar 150DX focuser, this reducer/field flattener also includes metal thread-on caps, M48 thread adapter, and back-focus spacer.