Poor focus with E-M1ii and 300 f4 pro

Started Jan 20, 2017 | Discussions thread
Messier Object Veteran Member • Posts: 7,468
Re: Poor focus with E-M1ii and 300 f4 pro

horsth wrote:

Messier Object wrote:

horsth wrote:

"Focal location adjustment for phase-difference AF"

That is used only for Four Third Lenses not for Micro Four Third what the 300mm/f4 is !

is there an official Olympus statement regarding this, or is it just an assumption.

Page 110 of the manual does not mention 4/3 lenses. Have you tried registering lens adjustment data for a m.43 lens ?


The older FT lenses use PDAF only. MFT-lenses use contrast detection for the last AF steps.

Except in C-AF and C-AF Tr where the camera uses PDAF

see this link to an Olympus site,


and scroll down to the table on High-speed AF System and read the table . . .

Still Image | C-AF | On-chip Phase Detection AF


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