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.A5100 test data on DxO Mark NEX-5N test data on DxO Mark
Fast autofocus and prefocused shutter lag; Quieter shutter sound; Captures 10 frames per second; Supports AVCHD 2.0.
Limited first-party lens selection; Slow and confusing on-screen user interface; top-mounted, proprietary accessories are quite pricey.
Very small and comfortable form factor; Very good image quality for its class; New dual video record function; Quick autofocus and good dynamic range.
Lacks an EVF and external mode dial; No hot shoe; JPEG processing at higher ISOs not as good as some competing mid-level models.