Inner-shell x-ray pinhole cameras are an important diagnostic for time-averaged beam profile measurements on PBFA-II experiments which require no shielding from the diode magnetic field. However, the same ions that create the inner-shell x-rays can also Rutherford scatter and directly expose the x-ray film. A double image, due to this effect, has been observed in PBFA-II data. In this paper, we derive the expected film density die to these scattered ions relative to the film density from the ion-induced x-ray line radiation from Titanium, Aluminum, and Gold targets. We then show that our calculated degree of ion contamination for a Gold target M{sub {alpha}} camera recently fielded on PBFA-II is consistent with the actual images observed --- a phantom image tentatively identified as proton contamination with a film density of the same order of magnitude as the x-ray image. The amount of ion contamination is strongly dependent on the optical filtering used. For less heavily-filtered cameras, we will show that this contamination will be less of a concern. We propose a different camera geometry for which this ion contamination will be a 5% effect in the Titanium and Aluminum K{sub {alpha}} cameras, but may be a 16% effect in the Gold M{sub {alpha}} cameras. 9 refs, 1 fig., 2 tabs.