In March of this year I bought an eos r6 and use ef lenses (16-35 / 4 L IS, 24-105 / 4 L IS and 70-300 / 4-5.6 L IS). The shots are unique and always in focus.
This week, however, I also tested the ef 24-70 / 2.8 L, which does not have an IS system, and noticed that the first shot in the series is almost always out of focus or shifted, and the next shots are sharp. I noticed the same problem with ef 85 / 1.8, ef 50 / 1.8 and ef 35/2 lenses, which do not have an IS system. The problem occurs if I have IS mode on / Still photo IS / Only for shot set on the camera. The shifted image appears both at long times, e.g. 1/15 second, as short, e.g. 1/1000 second. Apparently, IBIS starts too late, only during the first shot, when the shutter of the camera is already open, and in the initial start-up moves the sensor so that the image is blurred or. shaken. When it starts working, the following shots are sharp.
However, if I switch to IS mode on / Still photo IS / Allways, there is no problem and the first and next shots are sharp.
