The people at Hillbilly grip truck compares the Panasonic GH4 with the GH3, Canon 5D Mark III, Canon C100 and the Canon 7D:
C100 used canon 16-35, 24-105 and 70-200 2.8 isII. Color profile “default”
Gh3 used kit 12-35 and 35-100 Color profile “standard”.
Gh4 used the speedbooster with samyang 35 and 85 primes Color profile “standard” (i wish we’d tried out the cinema D profile. I’m betting that is the profile ready for release)
7d used 17-55 2.8 and 24-105 using standard profile with sharpness and contrast rolled off 2 clicks
5d used 24-105 and 85mm 1.8 with Lightform C profile
All the above lenses were used at f4 except for the “down the neck of the guitar” shot when everybody opened up as wide as they could…
Here’s a more ‘studio’ test between the Panasonic GH4 and the Canon 5D Mark III:
All three cameras used the exact same lens at the same f-stop, but obviously the full frame 5d3 had to move physically closer to match framing and has a much shallower DOF relative to the image. To maintain exposure, we used a lightcraft workshop variable ND ii. Any slight variations in exposure are just due to the finicky nature of the variable ND.
Finally, they have also published a ‘pan and scan’ version of the GH4 shot in 4K to see how it play in 1080p:
Read their full review and conclusions here.