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.G1X Mark II test data on DxO Mark G9X test data on DxO Mark
Cameras with more dynamic range allow you to take photos with dramatic differences in highlight and shadow areas while retaining detail in both.
Think of a brilliant sunset on a rocky beach: Bright sunset in the background, with dark rocks in the foreground. High dynamic range means more of the extremes will be faithfully reproduced.
Dynamic range test data courtesy of DxO Mark.G9X test data on DxO Mark G1X Mark II test data on DxO Mark
Wider, longer, faster lens than predecessor, with good overall optical quality; Faster AF performance; Closer macro shooting; Built-in Wi-Fi and NFC with remote shooting; Decent JPEG burst performance; Excellent build quality.
Localized flare issue when wide open; No real net improvement in image quality over predecessor; Slow burst mode when shooting RAW files; Poor battery life; Video quality is so-so (not like Canon DSLRs).
Smallest 1-inch sensor camera available; Slips in a pants pocket almost unnoticed; Bright lens at wide-angle; Great image quality; Swift 6.5 fps JPEG burst shooting; Intuitive touch-screen control; In-camera Wi-Fi gets images onto your phone easily
Limited 3x zoom range; Tighter wide-angle than competitors; JPEG buffer limited to 10 frames; very slow bracketing / raw burst shooting; Touch-screen menus take lots of tapping; Poor battery life