07-21-2016, 10:13 AM
The motors are different. While mirrorless focus units are driven directly, DSLR lenses use rotating motors (in general) and turn the movement to linear by using a thread. Which is very good to focus manually without wasting battery power, while the focus by wire most of the times feel slightly ackward.
With mirrorless the focus unit is driven directly, soemtimes up to htree drives are involved to speed up heavy glass and slow it down again, DSLR lenses use a kind of gearbox and move indirectly.
More info at lensrentals
With mirrorless the focus unit is driven directly, soemtimes up to htree drives are involved to speed up heavy glass and slow it down again, DSLR lenses use a kind of gearbox and move indirectly.
More info at lensrentals