The Takahashi FC-35 Reducer is a 0.66x focal reducer for FC-100DF/DZ fluorite doublet refractors. The FC-35 Reducer has an image circle of 44mm, making it suitable for use with full-frame sensors. The 0.66x reduction factor transforms the FC-100DZ into a 530mm f/5.3 widefield astrograph.
Spot diagram of Takahashi FC-100DZ with FC-35RD 0.66x focal reducer.
In order to use the FC-35 Reducer with the FC-100DZ, you will need the following adapters (sold separately):
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CAA (TSA-102) TKA23200 - M72 x 1 Male to M72 x 1 Female 35mm
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CA Ring 102 TKA23202 - M72 x 1 Female to M54 x 0.75 Female 12.5mm