A7iii video becomes flatter/foggier during recording

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facelikebambi New Member • Posts: 1
A7iii video becomes flatter/foggier during recording

Shooting video with a Tamron 28-75mm lens, manual white balance set.

A video (say 6 mins long) will gradually turn from normal to flat/foggy - see beginning and end captures here. Then if I record further video, the problem will show up in all of them.

Photos were also doing the same once the problem started. I cleaned the lens contacts and it seemed fine. Then happened again next day - initial video fine, fogging within 15 mins or so. Has happened on several occasions now.

Possibly lens condensation, but would it look like this? I'm in an indoor studio, so only rise in temperature would be camera heating up shooting video.

Thanks!

Start of video clip

6 minutes later, same clip

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