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> Could you please substantiate your claim with any references or information?

If you are dealing with a scene that has uneven illumination, for example, a sunrise or sunset, your camera metering will completely go nuts. The same happens when you are shooting snow.

Read about metering modes as one of the child comment had mentioned.

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Personally even for exceptionally uneven lit frames why drop into manual? Point the spot meter to the area you want exposed, hold hallway down and readjust shot. This is so much faster.

For places that are controlled for light and movement and field (tripod camera pointed at a sunset)... sure use manual.

Read about 5 degree vs 1 degree spot. Also read about reflectivity of different colours. Lastly your in camera spot accuracy depends on the focal length of the lens sitting in front of the sensor. You will also benefit from Ansel Adams’s zone system. Read the book if you have time. I think you will like it.

This is why for challenging exposures, we use a hand held meter.

Good questions.

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