Canon AE-1 Manuale - Pagina 17

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needle inside the viewfinder by pressing the shutter button halfway. When the meter needle

inside the viewfinder stays within the proper range and the underexposure warning LED lamp

below the aperture scale inside the viewfinder does not blink, the exposure is correct.

When the underexposure warning lamp inside the viewfinder blinks, or when the meter needle

moves into the upper overexposure warning zone in red, the exposure is incorrect. When this

is the case, turn the shutter speed dial until the meter needle inside the viewfinder moves into

the proper exposure range. To confirm this, turn the shutter speed dial while looking into the

viewfinder and pressing the exposure pre-~ view switch at the same time. It is convenient to

turn the shutter speed dial with your forefinger in order to swiftly cope with the speed of fast

moving subjects. When using shutter speeds slower than 1/30 second, the camera should be

placed on a tripod to avoid the possibility of camera shake.

c) Viewing and Focusing Focusing is performed in the small round area in the center of the

viewfinder. The smaller central circle is a split-image focusing screen and around it is the

microprism ring. The split-image rangefinder ascertains that the image is "in focus" when the

image divided horizontally in half matches and becomes one complete image.

It is also possible to focus with the matte screen outside the smaller central area. You can

focus with either of these focusing aids as you like, depending on the subject condition and

your preference.

Dioptric Adjustment Lenses Dioptric adjustment lenses can be attached by inserting them

from above into the grooves in the viewfinder eyepiece to compensate for the individual

eyesight. With them, near-sighted or far-sighted persons can perform photography without

glasses.

Accessories such as an eyecup, dioptric adjustment lenses, angle finders, and magnifier can be attached to the

viewfinder eyepiece.

One way of selecting the correct dioptric adjustment lens for you is to select the one that is the

closest to your glasses in regard to number of diopters. But, we propose that, when you select

the most appropriate dioptric adjustment lens, you actually look into the viewfinder through it

after placing it over the eyepiece.

Note:

Because the camera itself has -1 diopter, the diopters of the lenses are recorded as the real power when

attached to the camera, thus reflecting the power of the camera's viewfinder.

The microprism rangefinder presents a clear and steady image

when in focus. The microprism conveys a broken, shimmering

image when not accurately in focus.

The built-in eyepiece lens of the AE-1 has -1 diopter. The following 10

kinds of dioptric adjustment lenses are optional accessories: +3, +2, +1.5,

+1, +0.5, 0, - 0.5, -2, - 3, - 4 (diopters).