A breakthrough at Magic Lantern has opened up the possibility of shooting lossless 14bit DNG format on your Canon DSLR.
Magic Lantern developer a1ex has figured out how Canon decodes their CR2 files and modified the output to allow the camera to produce a lossless DNG file instead.
There is proof of concept over at the Magic Lantern forums as shooter Danne has posted a couple of lossless 14bit DNG files here.
There is no mention of when this feature may become available, but stay tuned.
image credit // PetaPixel