A measurement of the angular distributions and yields of fission fragments in the photofission of 234U has been performed between 5.2 and 6.4 MeV. As γ-source, the bremsstrahlung from a microtron was used. For the detection of the fission fragments, solid-state track detectors were used. The present data for 234U have been analysed together with earlier obtained data for 236U and 238U. The values of the fission barrier parameters obtained are compared to results in theoretical macroscopic and microscopic fission potential energy calculations.