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.G7X test data on DxO Mark C test data on DxO Mark
Very compact body fits in a pants pocket; Zoom lens is both brighter and further-reaching than anything offered by its enthusiast compact rivals; Selfie-friendly tilting LCD monitor; Intuitive touch-screen interface; Very good image quality for its class; Wi-Fi connectivity gets photos on your phone
No electronic viewfinder; Soft corners at wide-angle; Flare issues and fringing shooting wide-open; Weak performance when shooting raw files; Tendency to underexpose in low light; Limited battery life