When comparing Canon EOS 70D vs Olympus OM-D E-M5 II, the Slant community recommends Olympus OM-D E-M5 II for most people. In the question“What are the best cameras for photography under $1000?” Olympus OM-D E-M5 II is ranked 17th while Canon EOS 70D is ranked 19th. The most important reason people chose Olympus OM-D E-M5 II is:
The Olympus M. Zuiko Digital ED 12-40mm f/2.8 Pro lens has a very good build quality and is fast across the full zoom range with a constant 2.8 aperture.
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Pros
Pro Good camera for sports/action
The camera has a reasonably quick and reliable autofocusing system within the price range making it a good option for shooting fast-moving subjects.
Pro Reasonable high-ISO performance
Shots up to 6400 ISO are good and even above that threshold sometimes usable.
Pro In-camera RAW processing
Pro Good kit lens
The Olympus M. Zuiko Digital ED 12-40mm f/2.8 Pro lens has a very good build quality and is fast across the full zoom range with a constant 2.8 aperture.
Pro In-body camera stabilization
The camera has a built in 5-axis stabilization.
Pro Weather-sealed
The camera is dust proof, splash proof and freeze proof. You shouldn't have an issue with electronics when shooting in rain and other harsh conditions.
Cons
Con Superseded by its successor
This camera's successor, Canon EOS 80D, was released in 2016. While it's currently $200 more expensive and thus beyond the scope of this question, it is a better camera in every other way.
