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Takahashi FC-100DF f/7.4 Apo Refractor NIB

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 Takahashi has just introduced an updated version of the original FC-100 now called the FC-100D. It has been designed for the digital age. The FC-100D uses the Steinheil design with the fluorite element in the rear and an eco-glass front element. The focal ratio has been reduced to f/7.4 with a 740mm fl.


The FC-100D was designed with a goal of being light weight and highly portable. It is offered in two light weight models: the ultra-portable DC visual model that weighs just 2.8kg [6.1lbs] uses the 2.2” FS-60CB focuser. While the DF model uses the 2.7” focuser and is designed to be used for imaging as well as visual using the dedicated four element FC-35 .66x new reducer that changes the focal ratio to f/4.9 with a Ø 44mm circle at a focal length of 485mm.
The FC-100DF is optically identical to the DC model, but features an enhanced 2.7 –inch focuser.  It also features a shorter tube length that provides additional back focus for digital imaging applications.  This added back focus allows use of the FC-35RD reducer, which converts the DF to an f/5.4 instrument.
Optical Tube Assembly only (mount, tripod, tube holder and finder sold separately).  
  • Aperture:100 mm
  • Focal Length:740 mm, 486 mm with FC-35 Reducer, 1185 mm with Extender-Q 1.6X
  • Focal Ratio:f/7.4, f/4.9 with FC-35 Reducer, f/11.9 with Extender-Q 1.6X
  • Image Circle:44 mm with FC-35 reducer
  • Image Field:-
  • Back Focus:161 mm, 78.1 mm with FC-35 Reducer
  • Tube Length:815 mm
  • Tube Diameter:95 mm
  • Tube Weight:3.6 kg
  • Code TFK10110
  • SKU TFK10110
  • Weight 20411
  • Size X 106
  • Size Y 30
  • Size Z 38