Olympus Pen FT - Page 14

13
9 The "RIP scale:
This is the infra-red in-
dicator. To use infra-red
sensitive film, set the focus
first a nd then reset the
fOcu's to be line to the "R"
mark _ Infra -red photography
requires a red filter_
10 FjStop ring:
,
The silver ring at the front
of the lens barrel is F/ stop
ring _ On the upside of the
ring are engraved a series of
Through-The -Lens numbers
(see page 17) from 0 to 6,
and on
the downside a
series
of F- numbers (F / stop
values) from 1.4 or 1.8 to
16_ The larger the F/ stop
number , the smaller the F/ j
stop value_ Turn this ring
and align the Through -The-
Lens
number you need with
the black center dot.
* The Through-The -Lens
number can use midway
scale readings which the
sh utter speed ca n not _
* Pull forward the F/ stop
ring and turn it around then
you can set F-number on
the upside _
* To verify complete setting ,
make certain that the two
ends of the ring do not move
after the ring has been set.