Takahashi FC-100DF
The FC series are apochromatic refractors with two-element fluorite lenses. The FC series have larger apertures and longer focal lengths than the FS series, and provide...
Takahashi FC-100DC
The FC-100D series consists of an apochromatic fluorite Steinheil doublet with a 100 mm objective diameter. Both telescopes in the series are 740 mm f/7.4 instruments. ...