Lens modeling with the image obtained by summing the datacube within 8700−8800 Å in the lens galaxy’s rest frame. This wavelength range covers the Ca triplets of the lens galaxy. Top row, from left to right: Illustration of the data, the optimized-model-based reconstruction of the data, and the normalized residuals. Bottom row, from left to right: Illustration of the initial PSF model from STPSF, the iteratively reconstructed PSF, and the fraction of the lens light compared to the total light in the image. The reconstructed PSF will be necessary for dynamical modeling, and we use the lens light fraction to obtain the S/N of the lens galaxy for Voronoi binning.