F1000W image of the spectral calibration nebula SMP-LMC-58 from the commissioning program PID 1090. The image scale has been cut to highlight the structure in the background. The central core of the bright planetary nebula can be seen to cause column and row structure in the imager where the column structure creates a vertical stripe that is lower than the mean background and the row structure creates a stripe that is higher than the nominal background.