In the absence of flash, a torch can be used with a daylight bulb fitted or the conventional tungsten bulb if you prefer the warmer colour cast
Night scenes can include various sources of man-made light, which give off colour casts
very different from natural light.
Most cameras have an automatic white balance (AWB) setting that corrects for the colour cast
related to the light source.
City lights may appear bright to our eyes, but the reality is that their different sources (fluorescent, halogen, sodium, tungsten, neon) provide varying levels of intensity as well as colour cast
But, whereas the human eye is highly adaptive to different types of lighting and colour temperatures, a film camera isn't, and requires the addition of a colour-correction filter to the lens or tungsten-balanced film to compensate for the colour cast
Keeping the WB set to daylight will result in a distinct colour cast
on the image: orange for tungsten, green/blue for neon or fluorescent.
shoot with an 81-series warm-up filter to give stonework a more appealing colour cast
in overcast conditions
According to Canon, the advanced multi-area white balance technology detects multiple light sources and corrects the colour balance for each, removing unsightly colour casts
to give more natural results.
PDF Polisher-Pro also offers customisable presets for specific needs, such as faces, jewellery and deliberate colour casts
, which apply different levels of contrast, sharpness and colour correction, the company said.
Both are capable of direct CD/DVD printing on compatible disks, print borderless photos on selected paper sizes, and come with Epson PhotoEnhance software which detects faces, enhances skin tones, corrects for backlit images and colour casts
, and adjusts the printer to produce natural colours in outdoor scenes.
Part II: The Digital Darkroom teaches how to use Photoshop to accomplish what traditionally was done in the darkroom, from correcting colour casts
to making prints and exhibits for courtroom use.
As the colour temperature increases from low to high, the colour casts
rendered change in the following sequence: red, orange, yellow, white and blue/white.