Task: Explanation
Input (English): The Schmalturm turret was a tank turret designed for use on the Panzer V Ausf. B Panther II medium tank, Panther A and G medium tank, Panzer IV Ausf. J medium tank and the VK 30.02 DB (a medium tank prototype). The turret's shape resembled the Soviet T-34 tank turret. It featured a narrow front to maximize protection while minimizing weight. It was both lighter and easier-to-manufacture than the standard Panther turret. The turret had a stereoscopic rangefinder with lenses on either side of the turret, located in spherical bulges. No Schmalturms entered series production. Question: The schmaltrum turret could be found on what tanks other than the Panzerkampfwagen IV? Answer: B Panther II medium tank, Panther A and G medium tank
Output (English):  J medium tank and the VK 30.02 DB a medium tank prototype.