Shutter Speed
By: Amit Chawla
Blurred v/s Frozen Shots
Blurred v/s Frozen Shots
What is shutter speed?
It is essentially the indicator of the duration / timing at which the shutter curtain opens up and closes during an exposure process
1/8000, 1/4000, 1/1000, 1/500, 1/250, 1/125, 1/60, 1/30, 1/15, 1/8, 1/4, 1/2, 1 etc.
The shutter speed dial provide the selection of shutter speeds, and indicates the timing of the shutter open and closes.
A fast shutter speed such as 1/500 sec will close faster than, say 1/2 sec exposure time. In this case, the shutter curtain will close very fast and thus resulting in less light entering the film.
Shutter speed dial
What does shutter speed do ?
Different shutter speeds yield different kind of visual effect on a final photograph.
A fast shutter speed can freeze action while slow speed can blur your image
Examples of Slow Shutter Speed
Examples of Slow Shutter Speed
Examples of Fast Shutter Speed
Examples of Fast Shutter Speed
Creative effect of Combination
Aperture
By: Amit Chawla
What is Aperture?
The aperture is like a pupil in your eye. The pupil opening is bigger in a room with less light to allow you to see and Vice Versa.
In Photography, Aperture is referred to lens diaphragm opening inside a photographic lens.
The size of this diaphragm opening in a camera lens REGULATES amount of light that passes through onto film inside the camera.
The size of an aperture in a lens can either be a fixed or adjustable type (like an SLR camera).
How is aperture calibrated ?
Aperture size is usually calibrated in f-numbers. These are ratios.
i.e. f 22 (f/22), f16 (f/16), f/11, f/8.0, f/5.6, f/4.0, f 3.5 ,f/2.8, f/2.0, f/1.8 etc.
What it means is
f/16 will let in 1X the amount of light than a diaphragm opening of f/22 and so forth;
f/4.0 will let in 1X lesser than that of f/2.8 etc.
Aperture + Shutter Speed = Exposure
Aperture, along with duration/timing of shutter curtain opening, BOTH contribute to a the formation of an exposure.
Aperture also affects "depth of field"
Exposure
Balancing Shutter and Aperture:Exposure is about different combinations of shutter and f-stop settings. These combinations can drastically affect the finished picture.
A COMPARISON
ALL PICS HAVE SAME AMT OF LIGHT
Amount of light
Amount of light
Relation between A and SS
Aperture
Shutter Speed
Slow (1/30 sec) Fast (1/1000 sec)
Small f-stop (f4.5)
Overexposed — a slow shutter speed and small f-stop will both let in more light
Correct — a fast shutter speed lets in less light, but a small f-stop lets in more
Large f-stop (f22)
Correct — a slow shutter speed lets in more light, but a large f-stop lets in less
Underexposed — a fast shutter speed and large f-stop both let in less light
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