In this paper we study the statistical properties of the reconstructed object wavefunction of a weak phase-amplitude object from two low-dose image intensity distributions. The images are obtained by successively illuminating the object coherently by plane quasi-monochromatic waves which make different angles with the optical axis. The case is discussed for isoplanatic conditions and one lateral dimension. Explicit expressions of the mean and variance of the reconstructed wave function are presented in terms of the illumination dose. The low spatial frequencies which were hardly retrievable in the method based on two defocused images obtained under axial illumination are accessible in this approach.