I think this micrograph is pretty. Optical microscopy is useful to see what is really happening, it’s no use just going straight to high resolution without seeing what is happening on the millimeter and micrometer scale.
A mixed microstructure of martensite and bainite. Red needles are bainite in this micrograph, larger brown plates are martensite, the white bits are the untrasformed austenite. The contrast is from viewing the etched surface (nital) using differential interference contrast.