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.V2 test data on DxO Mark V1 test data on DxO Mark
Good image quality; Good quality lens; Full HD videos; Lightning fast AF; Fun to use.
Mode dial turns easily; Missing "modern" features like panorama, HDR; Somewhat heavy; Sluggish shot-to-shot cycle times; Proprietary external flash.