This document discusses several key photography concepts:
1) Aperture controls the amount of light entering the camera by adjusting the lens opening. Larger apertures allow more light while smaller apertures allow less light.
2) Shutter speed determines the length of time the camera shutter is open. Faster shutter speeds freeze motion while slower shutter speeds blur motion.
3) ISO settings control the camera sensor's light sensitivity, with higher ISO numbers allowing pictures in darker conditions but risking more image noise.
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Before launching our campaign, I compiled a brief presentation on my knowledge of Kickstarter and how we could make our campaign successful. This was presented to the rest of the team and helped to shape our campaign.
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2. Aperture (AV mode)
Aperture is the opening in the lens. In photography can be altered or
adjusted to control the amount of light reaching the image sensor. The
aperture size, along with shutter speed will change the amount of light
exposure on the photograph, a faster shutter speed will allow more
light exposure, a slower shutter speed will be a lower light exposure.
Aperture is measured in ‘f-stops’, moving from one f-stop to next,
backwards or forwards, doubles or halves the shutter speed as well
as the light.
Examples of different levels of aperture.
The aperture adds dimension to a photograph by blurring the
background and bringing the fore objects in focus.
3. Shutter Speed (TV mode)
Shutter speed is the length of time a camera shutter is open during
taking a picture. Shutter speed is measured in fractions of seconds.
The bigger the denominator, the faster the shutter speed. For
example, 1/1000 is alot faster than 1/30. More than likely, 1/60th of a
second will be used because otherwise the camera will shake, leaving
the photograph blurring unless you use a tripod.
Slow Shutter Speed Fast Shutter Speed
4. ISO settings
The ISO settings control how sensitive the camera is to that light. It
changes the sensors ability to take in light. The bigger the ISO
number, the larger the light sensitivity. If the lighting conditions are
dark, the higher ISO you will need. When using a high ISO, you are at
a higher risk of the photograph collecting grains of noise, which can
ruin the image.
Examples of using different levels of ISO settings.
5. White Balance
“In photography image processing, color balance is the global adjustment
of the intensities of the colors (typically red, green, and blue primary
colors). An important goal of this adjustment is to render specific colors –
particularly neutral colors – correctly; hence, the general method is
sometimes called gray balance, neutral balance, or white balance.”
(wikipedia.org/color_balance)
The date collected by image sensors must be transformed from the
acquired values in to the new values. Due to this being a part of colour
reproduction and display, often image noise is collected. Image noise is
the commonly-used term to describe a visual distortion where a random
variation of brightness and colour information appears in an image.
The left half shows the photo as it came
from the digital camera. The right half
shows the photo adjusted to make a
grey surface neutral in the same light.
Noise clearly visible in an
image from a digital camera.
The photo beside is a photograph I took
myself, the image noised.
6. The top two photographs look a lot more unwelcoming and nasty
and look very cold as they both have tones off blue which is a very
dark feeling colour. The bottom two photos on the other hand are
more warm, welcoming colours as they both have tones of red and
pink which are colours that describe feelings of warmth and
cosiness as such.
White Fluorescent Light / 1600 ISOTungsten light / 1600 ISO
Shady / 1600 ISODaylight / 1600 ISO