I would also stop down to F 5.6 or or 8 and use ISO 400 see what you get. So if you are using 30 FPS shutter speed is 1/60 th as a constant. I would put the camera in manual exposure and manually set shutter speed to double the frames per second. If you are stationary not moving try AF-S, be sure the camera is not in Pre-AF so it is Off. Can that be the problem? Has anyone had a similar problem and knows a solution? The latter two might affect the focussing? The aperture was at 5.6, which might be contributing, since the subject was roughly 5-6 feet away.Īlso, the subject was close to the background and the picture profile and lighting used might have lessened the contrast. But the AF drive speed was set to fast and AF track sensitivity to sensitive. The focus settings were AF-C, AF with face preference. The lens used was a Samyang 35mm, 2.8 FE, so that might also affect the auto focus working properly (although, this is my preferred travel lens due to its size and I've hardly ever had issues). Yet I'm not very experienced with video, so this is most likely user error.ĭuring the entire test run we did (roughly 15minutes), the camera constantly kept going in and out of focus in very small intervals of ~2 seconds, even though the camera was just on a stand and the subject was simply sitting at the table talking. I know the photography settings fairly well and haven't had problems with that. I use a Sony a7iii for photography and thought since we have to do this, and it's a straight forward set up without motion, we might as well use the nice camera for the video lectures. My husband and I both teach at a university and because of the recent lockdown are uploading part of our teaching as video-lectures.
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