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High partial dispersion ratios ?g

S-FPM4 is an optical glass with high partial dispersion ratios θg, F in the FPM region. The material is very useful for polished lenses that are effective for secondary chromatic aberration correction and these characteristics make it ideal for use in a wide range of applications, such as interchangeable photographic and broadcast lenses as well as automotive lenses. (maximum THK is 35mm)


  • High partial dispersion ratios θg, F


Type Code nc nd nF ng vd s.g. Coloring
S-FPM4 528765 1.52630 1.52841 1.53321 1.53694 76.46 3.76 340/-


S-FPM4 Glass Detail 1

Glass FPM4 Detail 2

Glass Products