(1) Turn on the meter and set an ISO film speed of 400 in the camera.
Aim the camera at a subject of average brightness and balance the meter
needle for correct exposure of that subject.
Now aim the camera at a
brighter light subject and then a darker one. The meter is functioning if
the needle responds, or the f/stop or shutter speed changes on automatic
(2) You can even make a reasonably accurate check on the accuracy of
your meter on a bright, sunny day. Set your f/stop at f/16 and convert the
ISO to a fraction. For example, using ISO 400 film coverts to 1/400. The
closest shutter speed is 1/500 of a second so set the shutter speed at
1/500. Point the camera at a lawn, the pavement, or the side of a building.
They must be in the sun. If the meter indicates an exposure of f/16, plus
or minus a half f/stop, it is working properly and is fairly accurate.
k. Your next step is to clean all glass surfaces.
Never touch the mirror on the inside of the
camera/lens housing, as it can be easily scratched.
(1) To clean the mirror, blow or lightly brush off dust with a soft
(2) Use a cotton swab or lens tissue to clean the viewfinder glass,
camera lens, and filters.
Never put cleaning fluid directly on glass surfaces.
It could seep under the glass and attack the glue that
binds the optics together or holds it in place.
(3) If you use a cleaning fluid, lightly dampen a swab or lens tissue
and then gently wipe the glass surface clean.