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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
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.
FC-100DF Visual System Chart
FC-100DF Extender Q System Chart
FC-100DF Extender C2X System Chart
FC-100DF 35 Reducer System Chart