This question already has an answer here:
I am planning to start using a light meter for portrait photography with an Olympus OMD EM5, off camera flash and an old Canon 135mm f2 manual lens. However having read about it, I think that I will need to adjust the meter reading to the micro four thirds equivalent values.
So, if the equivalent f value is double on the micro 4/3, does it mean that I need to use the exposure time shown but divide the f value from the light meter by 2?
For example if the light meter shows 250 / f4, I would use 250 exposure, but set my lens to f2 (instead of f4).
Can someone confirm whether my logic is correct?