Setting optimal focal length for image stabilization


Mu-43 Regular
Aug 7, 2010
I discovered in the user manual that in order to have the best image stabilization, you need the focal length on the value that best matched the focal length of the lens.

Do you only need to apply this for non M43 lenses?

And what happens when you change the value when you use a M43 lens? Is it then ignored?


Mu-43 Hall of Famer
Apr 4, 2010
I believe setting the IS focal length is important to stabilise the image.

When you put your native m43 lens on the smarts built into the lens will talk back to the camera and over-ride any IS FL setting. Notice that when you update your camera firmware it also checks the lens firmware - the camera and a native lens work together as a matched pair.


Mu-43 All-Pro
Feb 24, 2011
Dayton, OH
Is there any way to confirm this is the way it works (auto resets for M43 lenses)?

Is it also true with a lens like the Panasonic 20mm since that focal length is not in the IS settings list?

Is there any more in depth technical literature available than the users manual that at best leaves you guessing on things like this?
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