H I emission contours overlaid on Pan-STARRS optical images of IRAS 04296+2923 and its galaxy group members. Red, blue, and black contours represent the combined H I total intensity (moment 0) maps from the VLA D-array, VLA C-array, and FAST observations, respectively. White contours in the upper left panel indicate central H I absorption toward IRAS 04296+2923 as detected in the VLA C-array data. For the left panel, the contour levels are: red: 0.03, 0.06, 0.12, 0.24, 0.48, 0.96, 1.30, and 1.54 Jy beam⁻¹ km s⁻¹; blue: 0.09, 0.18, and 0.36 Jy beam⁻¹ km s⁻¹; black: 0.10, 0.20, 0.40, 0.80, 1.60, and 3.20 Jy beam⁻¹ km s⁻¹; white (absorption): −0.30, −0.40, −0.50, and −0.60 Jy beam⁻¹ km s⁻¹. For the remaining panels, the contour levels are: red: 0.40, 0.80, and 1.60 Jy beam⁻¹ km s⁻¹; blue: 0.18, 0.36, and 0.72 Jy beam⁻¹ km s⁻¹; black: 0.10, 0.20, 0.40, 0.80, 1.60, and 3.20 Jy beam⁻¹ km s⁻¹. In all panels, the lowest contour corresponds to the 3σ level. White and red crosses mark the optical and H I centroid positions of the detected sources listed in Table 3. Insets show zoomed-in optical views of the individual galaxies. The lower left inset indicates the synthesized beam sizes for each dataset (see Table 1 for beam parameters).