In Early 1942, the Panzer IV was equipped with a long barrel high velocity 75 millimeter L43 cannon and the improved variant was designated as model F2. This was able to penetrate the T34s armor ...

The Panzer IV Ausf H was also fitted with a long-barreled L/48 gun, which was considered at least as effective as the 76.2mm (three-inch) main armament of the Soviet T-34.