Takahashi FC-35 .66X Reducerfor FC-100DF, FS-102, and FC-100 Telescopes

The FC-35 0.66 X Reducer was designed by Takahashi Japan for a wide variety of their FC and FS series telescopes.

This FC-35 is compatible with the FC-100DF, FC-100, and the FS-102 when used with the CA 100 ring (sold separably). A FC-35 is also available with a CA 130 Ring for use with FC-125, FC-128, and FC-152 telescopes. 

The FC-35 will reduce the focal length of your telescope by 10%, and will provide a 44 mm diameter image circle. The metal back, as measured from the flat, rear-most shoulder of the FC-35, is 78.1 mm.

With the FC-35 installed, each compatible telescope will have the following focal length and f/ratio:

• FC-100DF: 485 mm, f/4.9
• FC-100: 526 mm, f/5.3
• FS-102: 542 mm, f/5.3