Olympus OM-2 - The most Important Feature of the; Direct Light Measuring

THE MOST IMPORTANT FEATURE OF THE OM-2 - TTL DI RECT LIGH T
... Diagram of light path in conventional SL Rs
Before shutter release
The instant the shutter has been
(A memory device
the shutter speed,
on the light
taken before
posure.) ----""'!" ... *++!--+-Mt---~
Stray
Light
41
... Diagram in light path in OM-2
Before shutter release
The instant the shutter has been rei
P
osition
In the automatic mode, the OM-2 measures the subject
brightness very differently from any other automatic cam-
era - faster and
with much more accuracy. With the OM -2,
light entering the lens is measured directly at the film plane
by the sensors at the precise moment the film is being ex-
posed. When
sufficient light has reached the film, the elec-
tronic brain senses the information and instantly clo s es the
shutter .