noun
Keplerian telescope
A refracting telescope design using two convex lenses, named after Johannes Kepler. Technical term in astronomy.
ケプラー式望遠鏡は、ガリレオ式望遠鏡より広い視野が得られる。
A Keplerian telescope provides a wider field of view than a Galilean telescope.
Galilean telescope uses a concave eyepiece, while Keplerian uses a convex eyepiece, resulting in an inverted image but wider field.
From the name of astronomer Johannes Kepler (ケプラー) + 式 (style/type) + 望遠鏡 (telescope).