Images of HH 34-IRS showing [Fe ii] line ratios that are sensitive to the electron density. Ratios are: a) 1.533 μm/1.644 μm; b) 1.600 μm/1.644 μm; c) 1.664 μm/1.644 μm and d) 1.677 μm/1.644 μm. Regions with no line emission above the 3σ noise level in regions of blank sky have been masked. The cross in each panel marks the H-band continuum peak position; the scale bar again corresponds to 0.8″.