This set of three tables gives exposure time requirements to reach fixed signal-to-noise per pixel for the slitless grism, again as a function of source AB magnitude. Here the columns correspond to specific wavelengths distributed over the spectrum to illustrate how the time to reach a given S/N varies with wavelength. The three tables are for half-light radii of 0, 0.2, and 0.3 arcseconds, and the signal-to-noise calculations assume an optimal weighted extraction of the spectrum.