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Difference Between Micro 4/3 and 4/3

Started Feb 13, 2013 | Questions thread
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Chris R-UK
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Slower focusing
In reply to Leonard Migliore, Feb 13, 2013

Apart from requiring an adapter, the main disadvantage of using 4/3 lenses on an M4/3 body is that they are slower focusing.

4/3 cameras were DSLRs with phase detection focusing whereas M4/3 cameras are mirrorless with contrast detection focusing.  The design requirements for phase detection and contrast detection lenses are different which is why the 4/3 lenses are slower focusing on M4/3 bodies.

Having said that there are some 4/3 lenses that have no equivalent on m4/3 bodies, e.g. the professional quality Olympus 50-200mm f2.8-3.5 lens.

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Chris R

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