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Sky-Watcher 0.77x Reducer/Flattener for Esprit 120ED f/7 Refractor
SKU: SKWS20209 MFR: S20209
Earn VIP Reward PointsKey Features
- Optimize your astrophotography with this Sky-Watcher reducer/flattener for sharper images.
- Achieve a faster f/5.4 focal ratio, perfect for capturing stunning deep-sky astrophotography.
- The 0.77x reducer enhances your Esprit 120ED refractor's field of view for wider shots.
- Enjoy a 3.18 x 2.12-degree field of view with a full-frame camera for expansive views.
- Designed with a three-element lens for superior image quality and minimal distortion.
- Features a 55mm back focus with M48 thread, ensuring easy camera attachment for astrophotography.
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About Sky-Watcher Reducer/Flattener
This 0.77x Reducer/Flattener is designed for the Esprit 120ED triplet APO refractor. It decreases the f/ratio from the optical tube's native f/7 to f/5.4 and reduces exposure time by 68% compared to native f/7 with the same results. Features 34mm fully illuminated field but can handle full frame as well, 95mm back-focus or 55mm using the included back focus spacer and M48 ring.
Sky-Watcher Reducer/Flattener Features
- 34mm fully illuminated field but can handle full frame as well
- 95mm back-focus (55mm when back focus spacer and M48 ring installed)
- Drops f/ratio from native f/7 (840mm) to f/5.4 (647mm)
- Reduces exposure time by 68% compared to native f/7
- Built-in 2" filter cell for mounting filters
- 3.18 x 2.12-degree field of view when used with a full frame camera
- 2.08 x 1.39-degree field of view when used with APS-C crop sensor