What is a megapixel actually, and how does it correlate to the maximum resolution and picture quality?

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I’ve heard about megapixels being the amount of pixels in millions that a camera can take but I don’t understand how a Canon EOS R6 II can take better photos zoomed in than an iPhone 15 PM with optical zoom despite having a lower megapixel count.

I don’t get how a megapixel count correlates to the resolution, and how significant it is to the quality of the image.

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18 Answers

Anonymous 0 Comments

You’ve got a lot of good answers here so I’ll just provide a little context.
A full HD tv has approximately 2 million pixels, it could display a 2 megapixel picture without losing any quality. A still image from a blu ray would basically be 2mp.

A 4K TV is the equivalent of about 8mp.

The actual numbers we throw around now (100mp+ on Samsung phones etc) are so meaningless since we can blow up an 8mp image to the size of a wall and it still looks good.

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