Canon Europe is confirming that the R3 is the first camera that leverages the Dual Power AF in the RF 400mm F2.8 and RF 600mm F4. I am really looking forward to seeing reviews that show whether or not there are noticeable AF speed improvements compared to the R5 with these lenses.
Also, this is another reason why seeing more RF big whites released will be very exciting, compared to adapting old EF lenses without dual power AF.
"Mike Burnhill, Professional Imaging Product Specialist at Canon Europe, explains that the enhanced autofocus speed with the
Canon EOS R3 is down to Dual Power AF. "These two super-telephoto lenses are the first to need the dual power supply," he says. "The optical groups in these lenses are much larger than those used in other lenses, so we drive them with large, high-torque, ring-type USM motors. There are actually two power inputs into these motors. The more power you feed into the motor, the faster it turns, and therefore the faster the autofocus speed can be."
The
Canon EOS R3 is the first
EOS R System camera that can take full advantage of lenses with Dual Power AF, thanks to its more powerful LP-E19 battery pack. "You need more voltage to drive the motor, which would have had too much impact on the battery life of earlier EOS R System bodies," explains Mike."
Vladimir Rys tested the Canon EOS R3 and the Canon RF 400mm F2.8L IS USM and RF 600mm F4L IS USM super-telephoto lenses on a fast-moving rally car shoot.
www.canon-europe.com