Plastic Lens Mount: Unlike the metal mounts found on most DSLRs, the 4000D features a durable plastic lens mount. It functions perfectly with EF and EF-S lenses but requires a gentle hand when swapping lenses frequently.
18.0 Megapixel Sensor: It utilizes an older but highly reliable 18MP APS-C sensor (compared to the 2000D's 24.1MP).
Smaller Screen: The rear LCD display is 2.7 inches (approx. 230,000 dots) rather than the standard 3-inch screen.
Integrated Power Control: The power switch is built right into the main mode dial rather than having a separate on/off toggle.
Unprinted Buttons: To save on manufacturing, the rear buttons do not have individual icons printed directly onto them; instead, the labels are printed on the camera body next to the buttons