Everyone seems pretty much happy with DPP4.
A simple ISO-invariance experiment, performed with an EOS 1200D, shows tremendous detail loss when the same .CR2 images are processed with DPP4 compared with DPP3.
My procedure is simple: shooting a picture (tripod, indoor) with varying exposure times and ISOs (aptly chosen), then boosting the EV in post-processing to match the picture taken on camera. Also, the very same noise reduction profile has been applied to all same-ISO-equivalent images (that is, the exact noise reduction profile that DPP* would apply to an in-camera ISO 3200 picture is applied in post-production to a +1EV ISO 1600 picture, and so on).
DPP4 processing is lagging behind at +1EV already. Things are just going to be getting worse:
Clearly, DPP4 is doing a horrible job in processing the boosted CR2 (top right) while DPP3 renders almost in par with the natively taken ISO 6400 image the +2EV boosted ISO 1600 CR2 file (top left).
What is your experience? Is anyone having these issues? How is DPP4 doing with better cameras than mine?
If anyone asks, I will be more than happy to provide full size CR2 files to experiment with (the full image has darker and brighter areas, I just wanted to keep it simple in here).
And NO, I'm not going to use Lightroom/RAWtherapee, etc. I want DPP4 to do a decent job out of the box.