PRAKTICA IV 1959-1964 A permanently
fixed pentaprism in place of waist-level reflex finder
PRAKTICA IV B 1961-1964 Built
in uncoupled photo-electric meter
PRAKTICA IV M 1961-1964 Wedge-type
split-image rangefinder cenre in the ground-glass screen
PRAKTICA IV BM 1961-1964
Combines built-in exposure meter of IV B with split-image rangefinder
of IV M
PRAKTICA IV F 1962-1964 Replacement
of the condeser reflex finder lens by a Fresnel image field lens
with split-image rangefinder and ground glass focusing ring; optical
system produces the maximum of even illumination right out to the
corners of the finder image
PRAKTICA IV FB 1963-1964
As model IV F, only with uncoupled exposure meter
PRAKTICA V F 1964-1965 The
first model with instant-return mirror and the standard geometrically-arranged
shutter speeds
PRAKTICA V FB 1964-1965 Tne
same as model V F, only with uncoupled photo-electric exposure meter