Shear calibration parameters due to differential chromatic refraction as a function of galaxy redshift, predicted analytically (solid black curve) and with a ring-test (colored symbols). Chromatic seeing is not implemented here. The filter is the LSST r-band, and the zenith angle is 45°. The predictions are based on a G5V stellar SED and an Sa galactic SED. The galaxy has intrinsic ellipticity ﹩| {{\boldsymbol{\epsilon }}}^{(i)}| =0.3﹩ and second-moment squared radius ﹩{r}_{\mathrm{gal}}^{2}={(0.3\mathrm{arcsec})}^{2}﹩. The PSF has second-moment squared radius ﹩{r}_{\mathrm{PSF}}^{2}={(0.42\mathrm{arcsec})}^{2}﹩ measured at the filter effective wavelength. The analytic prediction (solid curves) depends on the galaxy second-moment squared radius, but is otherwise independent of the profiles of the PSF and galaxy. +'s indicate the components of m and c oriented along and perpendicular to the zenith direction, and ×’s indicate the components oriented 45° to the zenith direction. The different colored plotting symbols indicate different assumed profiles for the galaxy and for the fixed-wavelength PSF, with r² fixed for both the galaxy and the PSF in all cases. The blue symbols lie directly under the magenta symbols (and are therefore not visible) since the ring-test predictions do not depend on the PSF profile when ﹩{r}_{\mathrm{PSF}}^{2}﹩ is fixed.