The Panzer III Ausf.F succeeded the Ausf.E as the next version of the Panzer III and was essentially a refined version of its predecessor.
Panzerbeobachtungswagen III - Tank Encyclopedia
Stridsvogn & Stormkanon KW-III (Panzer III & StuG III in Norwegian Service) - Tank Encyclopedia
Panzerkampfwagen III Ausf. A (Sd.Kfz. 141)
Panzerkampfwagen III Ausf.E (Sd.Kfz.141) - Tank Encyclopedia
Panzerkampfwagen III Ausf.B (Sd.Kfz.141) - Tank Encyclopedia
SdKfz 141 Panzer III
Panzerkampfwagen-I (1934)
Panzer II Ausf.A-F and Ausf.L - Tank Encyclopedia
Minimum Viable Product Panzer III Ausf. E
Tanks Encyclopedia – Colour Profiles
Panzer I Ausf.F - Tank Encyclopedia
The Panzerkampfwagen VI Tiger I heavy tank (1942)
Ausf.J, 12th Panzerdivision, Northern Russia, early 1944. Notice the long range radio equipment and ring mount for an AA MG 34.