Maximum effective ISO is an estimate of the highest sensitivity at which a camera can capture excellent quality photos.
Cameras with higher effective ISO will be better choices for indoor photography, night shooting, and indoor sports photography, especially if you intend to make large prints.
You can learn more at our glossary entry.
Maximum effective ISO test data courtesy of DxO Mark.A6000 test data on DxO Mark E-PL5 test data on DxO Mark
Excellent image quality with good color and dynamic range; Great high ISO performance for its class; Extremely speedy performer, with fast and accurate autofocus on stationary subjects; Lightweight, compact and ergonomic design; Touchscreen LCD that tilts all the way forward for taking self portraits; Tons of advanced functions and customizable options.
Confusing and frustrating menu system takes hours to master; AF isn't optimal for taking fast-motion action shots; LCD viewfinding suffers under direct sunlight; Mediocre HD video quality; No built-in flash (but a small external flash is included).
Amazing image quality for the price; Blazing-fast hybrid autofocus; Swift burst shooting with generous buffer depths; Good battery life with LCD monitor; More compact than a DSLR; In-camera Wi-Fi wireless networking
Continuous autofocus can't match its burst rate; High-ISO JPEGs can look overprocessed; Sluggish startup; No touch-screen display; Wi-Fi can be a bit frustrating to use