Luftwaffe gun camera footage

[seabolt]

Radar in WW2 was only able to give opportunity to acquire a visual, no-way could it be used to control fire

Of course you mean aircraft-mounted radar. Naval radar sets could target naval and air units fairly early in the war depending on nationality.

IIRC, the German units searched about a 70-degree cone, displaying the contact as a fuzzy blip on two rather small screens, one for altitude and one for bearing. Things improved over the course of the war, of course, but most of the advancement had to do with frequency hopping to avoid Allied countermeasures ... just like police radar guns and civilian radar detectors nowadays.

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