Designed specifically for the Sky-Watcher Esprit-120 ED Apo Refractor, the new three-lens Focal Reducer/Flattener has a reduction factor of 0.77x. It comes with a standard adaptor with an M48 thread edge and 55mm back focus for use with Sky-Watcher's M48 Canon EOS (code 20237) and Nikon (code 20238) adaptor rings. After removing the adaptor, an M71x1 internal thread with a maximum of 75mm back focus is available for self-made adaptor solutions. The Reducer/Flattener produces a fully illuminated and corrected image circle of 34mm diameter and is therefore perfectly suitable for image formats up to APS-C but can also be used for full format.
0.77x Focal Reducer / Field Flattener
Effectively reduces Focal Ratio of Esprit-120ED to f/5.4
Three-Lens Optical Design
Image Circle 34mm
Full Frame Compatible
2-Inch Filter Compatible
75mm Back Focus or 55mm with the supplied adaptor
Field Flattener: 0.77x
Adapter thread: M48 x 0.75
Warranty: 2 years
Kit content Sky-Watcher 0.77X Reducer/Flatenner for Esprit-120ED Triplet User guide
For more information about, Sky-Watcher 0.77X Reducer/Flatenner for Esprit-120ED Triplet website.