Tuesday, 2 April 2013

Available Light - Outdoors at Night (4.4b)

Requirement
12 to 20 images

Purpose
To explore the range of lighting and colour effects in low light

Technical learning
  • Dusk rather than night enhances the skyline of any night time cityscape
Camera craft issues to consider:

  • Camera Shake - Low light lowers shutter. Use a tripod and a cable release 
  • Noise - Raising ISO to increase shutter speed to offset motion blur will increase the risk of noise, the extent depends on the quality of the camera's sensor. So, minimise the increase in ISO consistent with motion effect required
  • Improper Auto Focus - Auto focus tends to malfunction, so use manual focus
  • White Balance - Colour temperature of light sources are often difficult to anticipate, so shoot RAW and adjust colour in post processing
  • Exposure - Some conditions are likely to exceed the camera's ability to operate at an acceptable exposure, so you may have to set shutter speed manually (bulb). This requires experimentation to get the correct exposure
  • Shadows - Flash or other artificial light creates strong shadow, so consider background lighting as well as lighting the subject

Exercise
  • Go to a well lit city centre
  • Use a tripod and cable release
  • Shoot as many images of (a) floodlit buildings, (b) brightly lit store fronts, (c) large interiors with many people and (d) a raised view over a busy road
Images and Review

City see from Hays Galleria in twilight
Dark enough to reduce shadow, light enough
to retain some detail

HMS Belfast in Twilight
Eyes adjust, camera doesn't
Lower light enhances colours
London Bus crossing Tower Bridge
Lower light enables moving lit objects
to create dramatic motion blur
Burlington Arcade at night
Pattern of colour and light adds
to sense of perspective


Office block, More London
Glass buildings become well lit
and rich in detail

Waterloo Station, 7.30pm
High ISO (6400) to freeze movement


No comments:

Post a Comment