Takahashi SD Ring for 76D Flattener

This flattener allows is needed when using the 76D flattener on a Takahashi telescope for terrestrial viewing. It adjusts the position of the flattener relative to the focuser draw tube to allow for the telescope to have a closer focus point.

End 1:      M56 x 0.75 female thread

End 2:      M56 x 0.75 male thread

Metal Back:  17.5 mm