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Is 4M image size the same as 4MB?
Thanks so much for the answer to what is probably a very basic question! I am working on resizing photos of my artwork for show entry. I am not a photographer!
Peggy
If you are referring to the Image size dialog in Photoshop, M means megabytes (MB)
So in the screenshot below, the image size is 137.3 MB.
And the image is 24 megapixels (MP) - 6000 x 4000 = 24 million
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There is Mega Pixels (MP) and Mega Bytes (MB). Two totally different things.
MP (Mega Pixels) is the number of individual photocells, Light capturing devices, on a sensor.
MB (Mega Bytes) is the amount of space taken up for that file to store it on a hard drive/SSD/USB stick/whatever.
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Moving to Photoshop​
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If you are referring to the Image size dialog in Photoshop, M means megabytes (MB)
So in the screenshot below, the image size is 137.3 MB.
And the image is 24 megapixels (MP) - 6000 x 4000 = 24 million