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.D610 test data on DxO Mark A99 II test data on DxO Mark
Cameras with longer battery life can take more photos before exhausting their batteries.
Eliminated sensor dust-and-oil spot issue from D600; Great controls for amateur or pro; Comfortable ergonomics and weight; Excellent image quality and low-light performance; Very good dynamic range; Excellent battery life; Built-in lens correction.
Not drastically different from D600; Moire with certain subjects; Auto WB still too warm in incandescent light; Slow AF in live view mode; Aliasing in videos.
Superb image quality at low, moderate ISOs; Improved high ISO performance; Fast continuous shooting speeds; Very impressive hybrid autofocus; High-quality 4K UHD video; Rugged camera body.
Multi-selector joystick can be awkward to use; No EVF live view at fastest burst rate; Buffer clearing is slow with no UHS-II support; 4K UHD video isn't as full-featured as E-mount counterparts.