[Brightcolours]

If you find a valve and a strong enough bicycle pump you can blow it up... With some luck and a really strong pump the black will turn into white.

 

It's because you get with both lenses the same shutter speeds at f/2.8 or any other aperture. That's what you equivalence preachers ignore in big style  DoF is only one thing in a picture.

No, you don't get the same shutter speed.

 

If you shoot an Olympus 200mm f2.8 on an Olympus OM-D EM10 at f2.8, ISO 800, and an Olympus 200mm f2.8 on an Olympus OM-D EM10 at f2.8, ISO 100, and let the camera figure out the exposure with the same metering method, do you get the same exposure time? Of course not.

 

Guess why.

 

And yes, homeopathy can't help, indeed. 

 

And that the earth was considered a flat disk by scientists is a myth.