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.E-PL7 test data on DxO Mark ZS100 test data on DxO Mark
Excellent image quality for its class including very good ISO performance; Improved performance and ergonomics over the E-PL5; LCD tilts 180 degree downward for easier selfies; Upgraded 3-axis IS system.
No built-in flash (but a small add-on flash is included); No built-in EVF; Default colors somewhat muted; Somewhat quirky menu system.
Compact camera body; versatile 10x zoom lens; relatively good high ISO performance; fast autofocus; many good 4K video and photo features.
Soft lens at longer focal lengths; no tilting display; small electronic viewfinder; slippery finish on the camera body.