ISO myths and re­al­ity strong er sig­nals

NPhoto - - Nikopedia -

■ When we talk about rais­ing or low­er­ing the ISO, you’d be for­given for think­ing that the sen­si­tiv­ity is be­ing changed. It isn’t. The sen­sor has a fixed sen­si­tiv­ity, mean­ing a fixed re­sponse to the light strik­ing it, and with Nikon con­stantly im­prov­ing sen­sor per­for­mance, it’s as good as you can get. What hap­pens when you raise the ISO is that the sig­nal from the sen­sor is am­pli­fied in the cam­era. That, sim­ply, is why in­creas­ing the ISO cre­ates a nois­ier im­age, be­cause am­pli­fy­ing the sig­nal also means am­pli­fy­ing the noise from the cam­era elec­tron­ics.

Newspapers in English

Newspapers from Australia

© PressReader. All rights reserved.