How is the OMD so fast

Started Jan 7, 2013 | Discussions thread
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s_grins
s_grins Forum Pro • Posts: 11,031
Re: How is the OMD so fast

rrr_hhh wrote:

In the case of the 20mm Panasonic, the lens elements seem to be activated by a spring, as is shown here . But not all have that type of design. In fact, that 20mm is an older design. How the lens is pushed forward and backward that fast in mft lenses isn't entirely clear to me. For sure the focusing lens elements have to be moved, but how ? They could even use magnets in newer lens designs ? and adjusts the movements electronically ?

rrr_hhh

I think that 1.7/20 lens is driven by screw motor (it sounds like s crew motor when active).  IMO the spring you relate to, is a common place in situations when screw/nut couple needs precise movement. This spring eliminates flex between two.

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