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.
K-01 test data on DxO Mark NEX-7 test data on DxO Mark24.3-megapixel sensor with excellent image quality; Small body; Exceptional user interface; Full HD 60p video; Electronic viewfinder and flash are built-in.
No Mode dial; Flash sync is a touch slow; No UHS-I card support; Needs a better kit lens to match the sensor quality.
Very good image quality and excellent high ISO performance. Premium build quality. In-body image stabilization. Lots of creative features. Full HD movie capture with manual exposure control.
Barely any smaller than a standard SLR, but lacks viewfinder and phase-detect autofocus. Contrast-detect AF is slow and unreliable. Body design is clumsy and uncomfortable. Very slow raw burst shooting.
