Originally Posted by derangedhermit
300 dpi is meaningless for display; it's a print setting. If you print it, 600x800 at 300 dpi is 2" x 3.something".
You can test this in an photo editing program. if the file is 600x800, changing from 300 dpi to 220 dpi or 72 dpi or anything else doesn't change the file size at all.
Wow! My day is complete - I have learned something new!!
I was always under the impression that the same image dimensions at a higher number of dots per inch would equate to a larger file size. But then I was thinking image dimensions as "6 inches x 8 inches" not 600x800 ...