Nikon PhotomicF Tn Finder, Инструкция по эксплуатации

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The Photomic FTN uses a center-weighted thru-thelens metering sys-
tem that reads the light over the entire focusing screen but favors the
central portion of the screen. This means that it is possible to get cor-
rect exposure in situations where an averaged reading of the entire screen
would result in underexposure of the main subject-with strongly back-
lighted portraits, for example. And since measurement is always done
at full aperture with Auto Nikkor lenses, the viewfinder image is bright
and clear.
The amount of light reaching the film (exposure) is detemmined by a
combination of lens aperture and shutter speed. Since the two are inter-
related, different combinations will give the same amount of exposure.
For example, 1/500 second at f/2 is the same as 1/30 second at f/8.
The choice of aperture and shutter speed depends on the results de-
sired. Choose a fast shutter speed to "freeze" motion, a slow one to
create deliberate blur. Use a smaU lens aperture for wide depth of field
or a large one to make the main subject stand out and throw unimpor-
tant background out of focus.
EXPOSURE MEASUREMENT WITH THE PHOTOMIC FTn FINDER
(Full-Aperture Measuring Method)
OUTSIDE WINDOW
Correct exposure
Overexposure Underexposure
EYEPIECE VIEW