Camera Basics White Balance White balance is a feature that ensures that the colour white is reproduced accurately regardless of the type of lighting under which a photo is taken At a very basic level.
Trang 1Camera Basics White Balance
White balance is a feature that ensures that the colour white is reproduced
accurately regardless of the type of lighting under which a photo is taken At
a very basic level, it is common to use the Auto W hite Balance setting
However, this setting is no one -size-fits-all solution For a white balance
setting that best suits the lighting source, choose one of the preset white
balance settings on your camera
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White balance makes sure your pictures turn out with the appropriate colour tone for the lighting
Points-to-note
- Its original function is to ensure that white appears white in your photos
- You can also use it to add a colour cast to your photos
Depending on the light source, the photo you take of a white object may take on a colour cast, appearing reddish or bluish, for instance This is
something that is not apparent to the naked eye, because our brain
automatically corrects the colour casting so that the white object still
appears white regardless of the light source However, cameras don’t have that ability Instead, this function is carried out by the white balance (W B) function, which ensures that white objects are depicted as white in photos regardless of the light source
Most of the time, if you were to shoot with white balance set to the "Auto" mode, which is also commonly known as Auto W hite Balance (AW B), the colours in the photo would be quite close to those that you see with your naked eye However, for some scenes, "Auto" is not able to make the
appropriate corrections, which results in colours being depicted differently from those that you see W hen this happens, choose a white balance setting
Trang 3from among the presets You will have a few options, such as “Daylight”,
“Shade”, “Cloudy”, “Tungsten light”, “White fluorescent light” and so on
However, you can also use the W B function to i ntentionally add a colour cast
to your photos Try it out for yourself: First, take a photo with the “Daylight” preset Compare it with photos taken with “White fluorescent light” or
“Tungsten light” See that the images are more bluish in tone than the on e shot with “Daylight”? Next, try “Cloudy” and “Shade” You will get images that are warmer in tone
Take note of these effects—you can use them to create drastic changes to the look of your final image
The difference between the various white balance presets
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Auto
Daylight
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Cloudy
Trang 6Tungsten light
White fluorescent light
Trang 7All examples shot with: EOS 5D Mark III/ EF50mm f/1.4 USM/ FL: 50mm/ Aperture-priority AE (f/1.4, 1/6400 sec, EV+1)/ ISO 100
These were shot outdoors on a fine day Compared with the photo shot with the “Daylight” preset, the white house looks warmer in the “Shade” and
“Cloudy” examples, and cooler in the “Tungsten light” and “White fluorescent light” examples Under normal circumstances, we recommend using “Auto” when shooting outdoors because it gives a more natural look
Auto
Trang 8Daylight
All examples shot with: EOS 5D Mark II/ EF70 -200mm f/4L IS USM/ FL: 70mm/ Aperture-priority AE (f/4, 1/250 sec, EV -1)/ ISO 100
The sky during sunrise and sunset are reddish in to ne W hen you
photograph them with white balance set to “Auto”, the function tries to
correct the red-cast clouds so that they will appear white, and this mutes the reddish colours in the sky If you want to emphasize the reddish tones
instead, here are the presets to try in order of increasing effect level:
Auto→Daylight→Cloudy→Shade
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Auto
Cloudy
Trang 10All examples shot with: EOS 80D/ EF -S18-135mm f/3.5-5.6 IS USM/ FL:
135mm (216mm equivalent)/ Aperture -priority AE (f/5.6, 1/200 sec, EV+1.7)/
ISO 200
If you were to photograph the light of a tungsten bulb using AW B, the light
will appear white in your image, although it really is a warmer tone For a
more accurate depiction of the white, choose the “Tungsten light” preset For
an even warmer tone, choose either “Shade” or “Cloudy” These settings will
impart an overall reddish tone, giving the entire photograph a warm feel
White balance correction function
If we were to get technical about colour tones, white balance presets can
only adjust colour tones alo ng the amber/blue axis To adjust along the
magenta/green axis, use white balance correction function This emphasizes
the purple/green tones, which can make subjects look more appealing
Trang 11To set the white balance correction function, first, fix the colour tone of the entire image by choosing one of the white balance presets Then, in the white balance correction menu, adjust along the magenta/green axis If you need to, also adjust for blue/amber, and there you have it—your custom-toned image
From the SHOOT menu, select [W B Shift/Bkt.] to display a screen like the one above Shift the square marker to the desired position on the grid
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The letters on the [WB Shift/Bkt.] grid each represent a colour Move the square marker in the direction of the colour you want to emphasize
Examples of white balance correction
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A:9
B:9
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G:9
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M:9
All examples shot with: EOS 6D/ EF24 -105mm f/3.5-5.6 IS STM/ FL: 24mm/ Aperture-priority AE (f/3.5, 1/500 sec, EV+1)/ ISO 100
In the above examples, I shifted the square marker by the number of units indicated in the caption for A(mber), B(lue), G(reen) and M(agenta)
respectively The effects of the adjustments are clear in the final images that result