Sony 50GM strange issue

Started 2 months ago | Discussions thread
Tristimulus Veteran Member • Posts: 8,161
Re: Sony 50GM strange issue

EminKuliyev wrote:

feeling so strange I compare it with an 85GM (85mm stay still like a rock) but i understand those lenses has a different type of focusing mechanism

Linear focus units are free floating when the current is off. Turn on the current and the focus unit resides in a magnetic field. This way the unit can move super fast and super precise and offer terrific auto focus even where the cheaper offerings struggle.

That rattling sound is comforting. It tells me that my lenses have state of the art auto focus mechanisms...

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