Thank you for the great reply a1ex.
That makes a lot more sense now. I do indeed use a Samyang 24mm F1.4 manual lens and I can see why the camera would 'remember' the last Canon lens I've put on it and it's relative aperture. I hadn't even thought of that. I will try the test you've suggested too.
I had considered that perhaps since the movie mode was using a 16:9 frame recording size, rather than the photo's full frame, the 'Eval' metering mode for movies was not using the top and bottom parts of the frame, therefore, using less of the picture to evaluate the metering level. This would be particularly different if, for instance, the picture had lighting at the top of bottom of the frame.
However, on reflection, I surmised that the metering would be done on the raw input of the sensor, before any cropping for video. Is this right?
As for the remembered aperture, is there a way to find out what that value is?
I think the best course of action is, as you've suggested, is to ignore the ELI altogether and use the histogram and ETTR. Since it just can't be trusted.
That makes a lot more sense now. I do indeed use a Samyang 24mm F1.4 manual lens and I can see why the camera would 'remember' the last Canon lens I've put on it and it's relative aperture. I hadn't even thought of that. I will try the test you've suggested too.
I had considered that perhaps since the movie mode was using a 16:9 frame recording size, rather than the photo's full frame, the 'Eval' metering mode for movies was not using the top and bottom parts of the frame, therefore, using less of the picture to evaluate the metering level. This would be particularly different if, for instance, the picture had lighting at the top of bottom of the frame.
However, on reflection, I surmised that the metering would be done on the raw input of the sensor, before any cropping for video. Is this right?
As for the remembered aperture, is there a way to find out what that value is?
I think the best course of action is, as you've suggested, is to ignore the ELI altogether and use the histogram and ETTR. Since it just can't be trusted.