There is no relationship between Carl Zeiss and Carl Zeiss Jena, except the original factory for Carl Zeiss was based in Jena, at the end of WWII, the scientists were given a limited time to collect their families & belongings to move to the new Allied controlled area. A majority of thw workers remained in what was to become the Communist controlled area (East Germany). This East German company became known as Zeiss Jena VEB and a new Carl Zeiss (West Germany) was sited in Oberkochen. In 1964 the Carl Zeiss production of binoculars and riflescopes moved to the "Hensoldt" factory in Wetzlar (which is where the current models are still manufactured). Hensoldt had been part of the Carl Zeiss group since the early 1920's. At the re-unification of Germany, Zeiss Jena became known as Jenoptik. Doctor Optik then started manufacturing some riflescopes from part of the old Jena factory, but Doctor are certainly not part of Carl Zeiss. Carl Zeiss Jena binoculars and riflescopes are not connected to Carl Zeiss. Hensoldt is now Carl Zeiss Optroniks Wetzlar (hand held solutions) and Carl Zeiss riflescopes and binoculars is now known as Carl Zeiss Sports Optics GmbH. Both companies operating out of the same factory, but independant of one another.
The factory in Hungary is a ZEISS factory.
ZA did not become ZF. This is two separate abbreviations. ZF is generally used by Optroniks for their riflescopes..
Forgot to add: If you see Victory V 3-12x56 then see Victory VM 3-12x56. The VM indicates that the scope comes with an inner rail. V = for ring mounting, VM = for rail mounting.