AE
Abbreviation for auto exposure. This key feature automatically sets the aperture
and shutter speed.
AE lock
During AE shooting, you can lock the aperture and shutter speed settings. With AE
lock, you can use the same aperture and shutter speed even if you change the composition
or even if the light changes. When you press the shutter button halfway, AE lock
and AF lock take effect.
AF
Abbreviation for auto focus. The camera focuses automatically on a subject to photograph.
AF lock
During autofocus, you can lock the focus and change the composition while the point
of focus remains the same. This is also called focus lock. When you press the shutter
button halfway, AE lock and AF lock take effect.
AI Focus AF
The camera switches automatically from One-Shot AF to AI SERVO AF when necessary.
See also: One-shot AF
AI SERVO AF
AF mode for continuous autofocusing on a moving subject. This mode predicts the
next movement of the subject so that the focus is correct when you take the picture.
This is also called predictive AF.
Also referred to as: predictive AF
A-DEP
Automatic depth of field mode ensures that the important areas in your photograph are in focus by selecting the nearest and furthest objects you want to be sharp.
angle of view
This indicates how much of the scene can be captured. It varies depending on the
lens focal length (mm) and the sensor size. Wide-angle lenses have a wider angle
of view, while telephoto lenses have a narrower angle of view. Also referred to
as: focal length
‘Anything but eye level’ theory
Getting down low or getting up high and taking a new perspective on your photography.
Experimenting with taking photos at different height levels to achieve different
looks.
aperture-priority AE
An AE mode which enables the user to set the aperture while the camera sets the
shutter speed automatically to obtain a correct exposure. It is effective for adjusting
the depth of field.
aperture
The amount of light passing through the lens is controlled by the aperture hole.
The aperture value indicates how much light can pass through. Since it is expressed
as f/2.8, f/16, etc., it is also called the "f-number." The f/1 aperture value represent
the maximum diameter of the aperture. When the aperture is half the size, it is
called f/2, and when a quarter of the full size, it is f/4. The f-number is therefore
the denominator of the fractional size. The larger the denominator or f-number,
the smaller the aperture size and the less light can pass through. Note that although
f/2 is half the diameter of f/1, the total area of the hole is only one-fourth of
the full-size hole (1/2 x 1/2 = 1/4). And so the amount of light passing through
is only 1/4 that of the full-size hole. When the f-number is doubled, the amount
of light shrinks to 1/4 of amount.
