Profiles of B_LOS (green curve) and continuum intensity contrast at 525 nm (blue curve) along cuts through four different magnetic structures in an example IMaX image (see text for details). The red dashed curves are the Gaussian fits to the B_LOS profiles. The FWHM of these Gaussian fits are given at the top of each frame. The horizontal dashed blue line is where the contrast is equal to unity. The limb is to the right of the figure, while disk center is to the left