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.T6i test data on DxO Mark T5 test data on DxO Mark
Very good image quality with great color accuracy; Lightweight and compact design; Great value for the money; Canon EF-S mount provides access to a vast array of lens options; Feature Guide and Creative Auto helps new users.
Slow burst mode; Shallow buffer; Without AF assist from flash low-light AF can struggle; Dynamic range and high ISO performance not as good as some competing models; No continuous AF in movie mode; Mono sound; No external mic jack.
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.