|F.A.B. (Frederik Berthus Archibald) Prinsen was a Dutch
inventor, born 1885 in Den Helder and died 1983 in Den Haag) who registered a large number of patents
concerning light measurement and aperture control among
other things. As a
Dutch engineer he was very active in al kinds of territories of
photography and cine. He had companies in the Netherlands
and also in Germany. 'Laboratorium Prinsen' is known for his
light meters and camera's he invented.
Together with William Rienks, he was the co-owner of the
film studio 'Electra' and worked on the method on 3D films
with a special kind of spectacles. Together with Loet C.
Barnstijn he developed the 'Loetafoon' a device coupling a
record player with a film projector for adding sound to movies.
Also a kind of roulette game is one of his inventions.
Prinsen manufactured several models of exposure and color meters.
His first meter made in aprox. 1935 was a very different design
compared to the other brands of meter. The needle (hand)
pointing to a exposure value holds the aperture values. The
Prinsen Directa and the Prinsen Simson are an oyster shaped
meter and the same design was used for the Prinsen Kelvina used
for color measurement.
In 1964 Gossen filed a patent for a color measuring equipment invented by FAB Prinsen. In 1965 Agfa filed a patent for an automatic aperture system in camera's also invented by Prinsen.
Type of measurement:
Sensitivity: ° DIN / 1600 ASA
Exposure time :
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