Light
Understanding Light
The quality of light is the single most important factor influencing the
aesthetic success of every picture you take.
The way light falls on an object totally dictates its physical
appearance:
how much texture and details is revealed, the strength and neutrality of its
colour and whether it looks flat or three-dimension. This in turn influences the
mood of your pictures and the way respond to them emotionally, so to get the
most from your photography you must have a thorough understanding of light and
how to use it to advantage.
The amazing thing about light - especially daylight - is it never stays the
same for long. It can be hard or soft, strong or weak, warm or cold and all
these permutations can be put to good use because they change the way the world
appears.
If you look at a scene on a cold, misty morning, for example,
it will look totally different than later in the day when the sun's higher in
the sky, or last thing before sunset, or in dull overcast weather. By studying
the way different forms of light work, you can decide when a scene will look at
its most attractive before committing it to film.
The colour of light also needs to be considered because the
film in your camera won't always see it in the way your eyes do. If you aren't
aware of this all sorts of problems can be encountered.
Time of Day
The greatest factor influencing the quality of daylight is the
time of day. As the sun arcs its way across the sky between dawn and dusk the
colour, harshness and intensity of the light undergo a myriad of changes. Here's
a breakdown of a typical day:
| Pre-dawn. Before sunrise there's a period known as
pre-dawn, during which any light present is reflected from the sky so it's
very soft, shadows are weak and the world takes on a sinister blue/grey hue.
Car photographers like to work during this period because the light is ideal
for revealing the sleekness and smooth curves of their subjects - the sky
acts like one enormous reflector. It's also ideal for landscape photography. |
| Sunrise. Once the first rays of sunlight break
across the horizon the light immediately warms-up. Long thin shadows also
rake across the ground, revealing texture and form in the landscape, and because
the earth is still cold they have an eerie blue cast.
Landscape and travel photographers prefer to be out and about during
this period - any time between 4 - 7am, depending upon the time of year. So
much happens so quickly, and the mood of a scene can be totally transformed
within minutes.
The world is quiet and still, the atmosphere cleansed during the night, and
veils of mist hover above water and roll off the mountains. You just can't
fail to take beautiful pictures in the first light. |
| Morning. As the sun starts to climb into the sky the
earth warms and the mist burns away to increase visibility. The light also
becomes more intense, its warmth gradually fades back to white and shadows
grow shorter and denser.
During the summer months your okay to continue shooting until about 10am,
but after that conditions aren't so favourable. With the sun almost overhead
- it reaches its zenith around noon - the light is very harsh. People look
pale and pasty and their eyes are turned into lifeless black holes by the
hard shadows. The facades of buildings are also poorly lit, while landscape
looks flat and texture less.
Your best bet is to avoid shooting again until mid-afternoon - about 4pm
during summer - and spend this period looking for new locations, or if your
shooting portraits, step into the shade where the light's much softer. The
only exception to this rule is during late autumn and winter, when the sun
never climbs too high in the sky and you can happily shoot all day long in
attractive light. |
| Afternoon. By mid-afternoon the sun will be
descending towards the horizon, so you can get to work once more. As it
falls lower in the sky the light warms-up and shadows become longer,
revealing texture and modelling to give your pictures a strong real
three-dimensional feel.
Perhaps the most photogenic time of day is the hour or so before sunset,
when the world is bathed in a sumptuous golden light and long shadows once again
reveal texture. The light is much richer than at dawn because it's scattered
and diffused by the thicker atmosphere.
This period is ideal for landscapes and architectural photography, plus
outdoor pictures of people. |
| Twilight. Once the sun has disappeared twilight
transforms the sky into beautiful shades of blue, purple and pink, providing
you with yet more opportunities to take successful pictures. Again, the
light is soft and shadow less, with the sky acting like a huge diffuser.
Seascapes and lake scenes look particularly beautiful during twilight, because
the colour of the sky reflected in the water surface. |
| After-light Gradually light levels drop as the sky
turns a steely blue colour, man-made illumination takes over as the
streets come alive. The times has arrived to shoot some stunning night
scenes. |
Finding the Sun
Being able to track the path of the sun so you know
where it will be at different times throughout the day is a handy skill to
have, especially if you specialise in landscape or architectural
photography.
Most people assume that the sunrises in the east and
sets in the west, but this is only true for a few days each year. The rest
of the time these positions change, and so does its path across the sky.
In summer, for example, the sun rises slightly south of
east and sets slightly south of west, while in winter it rises slightly
north of east and sets slightly north of west. This may not sound like
much difference, but in reality it means the sun may rise and set in a
totally different position to where you expect.
If you're out before sunrise you can usually gauge where
the sun will come up by looking towards the brightest area on the horizon.
Once the sun has risen, a compass comes in handy for identifying the
positions of east and west. That way you can roughly predict the path of
the sun during the rest of the day so you know more or less where it will
be in relation to a particular scene or building, say, then return to
capture it in the most attractive light.
There are tables and links to sites that can predict
this for you on this page. |
Weather or not
Variations in the weather have a profound effect on the
quality of the light.
Direct sunlight, for example, is very harsh and intense.
But as soon as a cloud obscures it the light is diffused and the hard edge
is taken off the shadows. The thicker and larger the cloud, the more
pronounced this effect is, until in overcast days the sky acts like an enormous
diffuser so that shadows simply don't exist.
Many photographers think of dull, overcast days as
boring and uninspiring, but the light is perfect for flattering portraits
and moody landscapes. You'll need and 81A or 81B warm-up filter to combat
the slight blueness in the light, but other than that it's wonderful.
Bad weather is worth pursuing too. There's nothing
enjoyable about being soaked to the skin or blown to bits, but if the sun
breaks through during or immediately after a storm the light can be
stunning, with buildings and trees picked out by shafts of bright sunlight
against the dark, threatening sky. Storm clouds also make for dramatic
pictures, and if you're lucky you may have the chance to photography a
rainbow, or even lightening.
Reading the weather
Although it takes years of experience to accurately
predict changes in the weather, there are a few tips worth bearing in
mind.
| The crossed winds rule. The direction the wind
is blowing can offer clues about likely weather changes. To do this,
turn your back to the wind then turn 30° clockwise.
If, from this position, the clouds appear to be moving left to right,
weather conditions are likely to deteriorate. However, if they're
moving right to left, the cold front is receding so conditions will
improve. |
| Rainbows appear when the sun breaks
during a storm and shines through failing rain. If you turn away
from the sun when this happens the rainbow will be in front of you.
The centre of the bow is always as far beneath the horizon as the sun
is above, so around midday it appears close to the ground, while
during early morning or late afternoon it arcs overhead. |
|
-
|