: Help ensure your autofocus is properly aligned with a Canon Precision Alignment : New firmware version 1.1.1 is available for EOS R6 Mark II : New firmware version 1.8.1 is available for EOS R6 People with oscillopsia describe symptoms like these: jumping, jittery, wobbly, or shimmering vision. : New firmware version 1.0.3.1 is available for EOS-R5 C : New firmware version 1.4.1 is available for EOS R3 Since I have seen several threads with other autofocus problems, in other models of EOS cameras, I guess this is fairly pervasive, but since I actually use video fairly rarely, I can live with the fix - do it yourself focus. If I advance the clip one frame at a time, the new frame stays in focus for 1-2 seconds, then goes out of focus. If I resume running the clip, it snaps right back to perfect focus. Disappointing, because it would be great to allow the train to approach without manually adjusting the focus, but I worked on embedded firmware for decades and understand problems can arise in corner cases. If I pause a nicely focused clip, in pause mode it is noticably out of focus in the monitor window. At this point I must assume that it is a firmware defect in the camera or the long lens and will have to avoid autofocus in these types of scenes in video mode due to the bright point-source lights. The lights were very small and bright and to my eye, noticeable when they went out of focus over and over. But the worst problem was looking at a locomotive head-on with three headlights in a triangular configuration. I have tried all sorts of combinations of Tripod with/without stabilization, autofocus long (3m/infinity vs full range), and all sorts of scenes of stationary and moving objects.
VIDEO GOES OUT OF FOCUS THEN BACK IN FOCUS MANUAL
I have found in the manual page 165 "Shooting conditions that make focusing difficult" item 7, "Night scenes or points of light" - well, this may be the source of the problem.
0 kommentar(er)
