Thank you Kevin. You are always together and close. My intent with this comparison is to show that despite of the site and camera, we can get excellent photos from some kind of DSOs.
When you shot cluster and stars some apparent imperfection isn't a true imperfection. Look the yellow and red stars on ESO photo. See the distortion of the Airy disk. They are similar in mine photos.
Did ESO use DSLR Canon, also ?
