Most cameras provide adjustable controls that can be used to ensure you achieve sharp, correctly-exposed images. In this chapter we’ll address the most important camera settings.
Sensitivity
Most image sensors have been designed for optimal performance at low sensitivity settings, with a ‘native’ setting, typically between ISO 100 and ISO 200, where the camera performs best. To achieve higher settings, the digital signal (produced by the exposure) must be boosted electronically.
It’s common for compact cameras to offer ISO settings up to ISO 6400. Most interchangeable-lens cameras can go as high as ISO 25600 and some extend this further to ISO 51200. Some also offer ‘low’ ISO settings of 50 or lower, although performance is reduced slightly.
The standard ISO range adjusts sensitivity in one-stop increments, which double or halve…
