I used my Canon 5dmk2 w/ 16-35Lmk2, 24Lmk2 and 100-400L. I supplemented my photography with the E-M5. The E-m5 was a stellar performer. I only currently have a 14 f/2.5 and 25 f/1.4 and I'm quite certain I'll be adding more primes. Infact I just purchased the M43 system for this Alaska trip. Available light photography the e-m5 produces great IQ compared to my previous 50D and 1dmk3 canon dslr's. I prefer the IQ of the E-M5 over the Canon 7d. The E-m5 will never substitute my canon full frames but I find I sometimes have more photographic opportunities using a small camera with excellent high ISO performance. These photos have been taken in my recent trip. Xrite passport used for my colour management work flow. I've also used some split toning presets.