Lens Camera
February 14th, 2009
How come digital photos from the same lens/camera take up different amounts of memory?
I have a Canon Rebel XT camera. Some photos (Jpegs) only take up about 1.2MB while others take up 6MP. Why is there variation when the same camera/lens is taken for each photo? Also, Canon XT is an 8mp Camera. Shouldn't each photo be 8mp? Thanks!!!
PS: Photoshop tends to increase the memory of a photo. Why is that?
First off, megapixels aren't the size of a photo. It's what makes up the photo. You are thinking of megabytes, which would be the size of a photo and how much room it takes up on your memory card.
Yes, more megapixels usually means more detail and a larger size, but that's not always true. And depending upond your settings (Fine, Normal, etc) can change the size and quality of your photo. Also, EXIF data is enclosed with each photo you take, and not every photo has the same details. Every picture is going to be a different size. Just depends on the quality, etc.
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