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.X10 test data on DxO Mark EX2F test data on DxO Mark
Really solid body littered with external controls feels like a camera should; Very bright zoom lens; Clever EXR modes; Raw support.
White orb problem; EV dial difficult to turn; Below average battery life; Shallow buffers; Occasional demosaicing errors.
Good (modern, not retro!) looks and solid build; f/1.4 Schneider-Kreuznach lens starting at a wide 24mm equivalent with excellent low-light capabilities; Advanced photographic controls and RAW capture; 3-inch, articulated AMOLED monitor.
Limited telephoto reach; Inconsistent and disappointing JPEG images; Some corner blurring at both wide and tele; Noise suppression too strong at ISO 800 and above, robbing detail.