I have an Eos 5D Mark3 since few months, it replaced the Eos 5D2 I used in India that had partially left me because of poor weather sealing giving problems to the contacts. I always judged with some reservation the image quality of the 5d line , coming from the 1Ds mark2. These cameras do produce excellent images, but some really bizarre problems in cameras of this level do continue to appear. Already in the Indian photos, taken with Eos Eos 40D and 5D Mark2, I started to notice some strange things: the old 40D held up much better than the other when some overexposure of the shadows is applied in ACR, without altering the overall exposure. The Eos 5D Mark2 had often noise in the shadows at low ISO, even 100, a noise made of stripes (vertical banding), as the image from a fax.
I have not changed the Mark2 because the camera was broken, the problems with the contacts were resolved immediately by the excellent Canon Service Center in Rome. I decided to change it for many reasons, starting from the AF, a most versatile one, but also for a significant improvement in the well-known problems of noise, at least as for these already seen in the EOS 5D2. A general upgrade in short, without waiting for miracles but certainly hoping for a more complete and versatile camera for all uses, eg. also for sport, in which the Mark2 was very lacking.
