Photo Review tips section

How to Use White Balance Effectively

The white balance setting is used to make the colours in a digital photograph look natural under different lighting conditions. It works by adjusting the colour balance so that objects which appear white in reality are rendered white in the image. To do this, the camera has to evaluate the ‘colour temperature’ of the light illuminating the subject and correct for its relative warmth or coolness of white light.

Aliasing: should you be concerned about jaggies?

The term ‘aliasing’ is a general term applied to signal processing. It refers to an effect that causes different signals to become indistinguishable (or aliases of one another) when sampled. In imaging, it’s often observed as ‘jaggies’, which appear as steps along what should be a continuous line or edge. These are caused by pixel structure. Aliasing can also produce moire, when fine lines appear to ripple due to the interference.

Lenses and Focusing Basics

The lens in a camera is like an eye that lets light into the camera body and focuses it on the sensor, where the image is recorded. The larger the optical components (known as ‘elements’) in the lens, the more light gets in. The quality of the elements influences the camera’s picture quality.