About this product
Part Number: TATKA19580
Takahashi TKA19580 FC35 0.66x Reducer for use with FC100DF and older FS102/FS128/FS152/FC-100 Triplet and FC-125 Triplet Telescopes.
The FC-35 0.66x reducer was designed to be used with the FC-100DF to produce a 485mm focal length at f/4.9 which is a 34% reduction in the focal length. It produces a field flat to within 20 microns over a 35mm full frame.
Model Focal Length Image Circle CA Ring** Metal Back*
FC-100DF 485mm [f/4.9] Ø 44mm TKP19205 78.1mm
FC-100 526mm [f/5.3] Ø 44mm TKP19205 78.1mm
FS-102 542mm [f/5.3] Ø 44mm TKP19205 78.1mm
FC-125 672mm [f/5.4] Ø 44mm TKA31202 70.3mm
FS-128 700mm [f/5.5] Ø 44mm TKA31202 70.3mm
FS-152 819mm [5.4] Ø 44mm TKA31202 70.3mm
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