NA 149
DIN Standards Committee Entertainment Technology, Photography and Cinematography
Standards
[Withdrawn]
DIN 5037-4
DIN 5037-4
Photometric evaluation of floodlights; classification by the half-angle of dispersion
Title (German)
Lichttechnische Bewertung von Scheinwerfern; Beleuchtungsscheinwerfer, Kennzeichnung durch den Halbstreuwinkel