Pentax ME Super - Aperture Setting

APERTURE SETTING
Preselection of the lens aperture is optional when shooting in the “М”
(Manual) mode. However, when shooting on "AUTO", it is recom-
mended that you preset the aperture. This is because the shutter
speed selected by the automatic exposure system is determined in
relation to the lens aperture used. By presetting the aperture control
ring to an f-number that is appropriate for lighting conditions in the
picture, problems of over and underexposure can be largely eliminated
When shooting on “AUTO” (or manual when applicable), preset the
lens aperture as suggested in the following table
Fine weather " f/8— f/11
Cloud weather ^» f/4— f/5.6
Indoors £/1.4 — 1/2.8
To set aperture: The calibrations on the aperture control ring of the
lens are referred to as f-numbers or f-stops and denote the size of the
lens aperture. To set the aperture, align the figure equivalent to the
recommended f-number with the diamond index mark.
Note on f-numbers: Lower f/numbers (such as f/1.4) denote wider
lens apertures, while higher-f-numbers (such as f/22) denote smaller
apertures. With the 50mm f/1.4 lens, for example, f/1.4 is the widest,
aperture or “open-aperture,”’ while f/22 is the smallest aperture ог
“minimum aperture." As the size of the aperture also affects the
overall sharpness of the photo, you may occasionally wish to vary the
aperture setting from the norm for different effects (See page 32.)