"RT" stood for "Real Time." Thanks to its fixed pellicle mirror, this camera drastically minimized shutter lag. Built with professionals in mind, a simple half-press of the shutter button puts the camera into an immediate state of readiness. Once fully depressed, it takes a mere 0.008 seconds for the first shutter curtain to release. The camera is fully packed with features, offering a continuous drive speed of 5 fps, predictive AI Servo AF, auto exposure bracketing (AEB), multiple exposures, six AE modes, manual metering, and 15 custom functions. Operating the Canon EOS 650 (the first EOS), 620 (the second EOS), 600, and RT is virtually identical, with only subtle nuances separating them. Almost all dials and buttons share the exact same layout and tactile design. Of course, the hallmark of the EOS RT is the dedicated "RT" setting on the main command dial, which unlocks that lightning-fast 0.008-second release response. If you prefer a more traditional feel, one of the custom functions allows you to switch the lag to 0.04 seconds—perfectly mimicking the shutter response of the legendary mechanical Canon F-1.

Every single Canon EF lens features a built-in autofocus motor. This key innovation set the Canon EOS system apart from its competitors at the dawn of the autofocus era. While other manufacturers relied on an AF motor built into the camera body—using a mechanical drive coupling to physically turn the lens elements ("screw-drive autofocus")—Canon put the motor right where the action is: inside the lens itself.