Basic rule (FF): without IS, shutter speed should be 1/focal length.
APS-C rule: without IS, shutter speed should be 1/(1.6 * focal length).
What about (APS-C) mirrorless bodies rule, fellow friends from Canonrumors?
I suspect that the shutter spead should be much faster, because the camera body, without viewfinder-eye contact, is less stable than the DSLR's one.
Is there a basic empirical rule/suggestion for mirrorless, for example 1/(3 * focal length)?
Thank you in advance.