A method is described for obtaining optical spectra of solids subjected to short duration pulsed magnetic fields of the order of 300 kOe. A spectral region is scanned repetitively every 28 &mgr;sec by a moving slit and detected photo‐electrically, making it possible to measure wavelength and intensity changes of spectral features as a function of magnetic field. Provision is made for cooling the sample to liquid helium temperature. The Zeeman effect of the7F0−5D2transition of3+Eu in europium tungstate is used as a demonstration of the technique.