![]() The multi-purpose wheel with an exposed, rubberized edge is an interaction method we now take for granted the T90 was the first time it appeared, to my knowledge. It was radically different than the control approach on most cameras to that point, where one knob or button did just one thing.īut it became the interface paradigm used by every high end SLR to the present day (though recently the pendulum has begun to swing back and we're seeing a resurgence of function-specific knobs again). While it allows a lot of breadth of control, it does take some getting used to. This made the camera highly "modal" in user interface speak - you could only do one thing at a time, and had to change modes in order to adjust something else. It introduced a large top-deck LCD, and the vertical wheel next to the shutter button that could be made to control multiple parameters of the camera when used in combination with other buttons. ![]() ![]() ![]() The T90's was considerably more sophisticated and refined. The T70 and even the AE-1 that came before it were Canon's first attempts at evolving the way users adjusted the settings of a complicated camera - exposure mode, shutter speed, aperture, ISO, exposure compensation, etc. ![]()
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