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.A3000 test data on DxO Mark T6i test data on DxO Mark
Absolutely incredible value; Includes a stabilized kit lens; More versatile than a fixed-lens bridge camera; Comfortable body with good ergonomics; Great image quality; Good autofocus performance; Decent battery life.
Feels a bit plasticky; Slow burst shooting with limited buffer; Sluggish to power on or switch modes; Low-res EVF and LCD monitor; Can't review images using EVF; No video output; Weak flash; Battery charges in-camera.
Highest resolution Canon APS-C camera yet; Improved dynamic range over T5i; Good high ISO performance for its class; Very fast autofocus; Built-in Wi-Fi with NFC; Touchscreen tilt/swivel LCD.
Shallow buffer depth with RAW files; Below average battery life; No Servo AF in Live View; No 60p video frame rate.