Zoom-in onto the Fe II absorption lines from the SN ejecta at selected epochs of the photospheric phase. The SN photosphere expands with a velocity of merely ≈8500 km s⁻¹. There are no signs of deceleration between t_max and t_max+100 days. Starting at about t_max+30 days, emission from [O III] λλ 4959,5007 (grey shaded region), produced by the interaction of the SN ejecta with circumstellar material, contaminates the blue wing of Fe IIλ 5169.