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Canon eos 850d vs pentax k 3 mark iii?

The Canon EOS 850D and the Pentax K-3 Mark III are both APS-C DSLRs, and the spec sheets point to a few clear differences. The K-3 Mark III has 25.7 megapixels against the 850D's 24.1, and it has in-body stabilisation, which the 850D lacks. That matters if you shoot handheld in dim light, so for the 850D you'd want a stabilised lens. The 850D is on Canon EF-S mounts and the K-3 Mark III on Pentax K. Choose by which system's lenses you want to build around.

If you're starting out, I'd pair the Canon EOS 850D with the Canon EF-S 18-135mm f/3.5-5.6 IS STM and the Canon EF-S 24mm f/2.8 STM. On the Pentax K-3 Mark III, try the Pentax smc DA 18-135mm f/3.5-5.6 ED AL [IF] DC WR and the Pentax smc DA 50mm f/1.8 for people. For the basic split, see your first camera and lenses.

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