Micro Four Thirds versus standard DSLR systems

So if you would like to learn a bit more about the pros and cons of both systems, check out this article

What I want to address is the different lens focal lengths of both, because I've been throwing out numbers like 50mm, 100mm, 28mm, and those aren't accurate standards for four thirds systems. 

A Canon APS-H sensor size is more comparable to a 35mm film camera, the standard for film based SLR's.  The lens focal lengths for 35mm film systems are more commonly known, so I started there.  For instance, a Canon 5d has lens kits most comparable to the old 35mm film system, so its "normal" lens is 50mm.  

As you can see, the Four Thirds System has a much smaller sensor and what that means is that the lens focal length counterparts to the standard are shorter (pretty much cut in half)

Standard Focal Lengths (lens types) for a Micro Four Thirds system:

•Normal 25mm

•Wide 12mm

•Long 40mm

•Zoom 12-40

DSLR versus Mirrorless