Yes; Most recent cameras save files at 200 or 300 DPI. For internet photos cut this down to 72 DPI and the files will shrink by several times.
That can get pretty confusing for people. Average monitor is 72 PPI.
(pixels per inch) Average printer is 300 DPI (dots per inch)
Even if you use the DPI and PPI interchangeably, people don't understand
why a pic looks OK on a monitor but not on a print.
Take a photo that is about 4x6 on your monitor at 72 PPI (or DPI) you
get 288 x 432 pixels (124,416 pixels )
Make that same 4x6 print on your 300 DPI printer and you need
1200 x 1800 pixels (2,160,000 pixels )
So the print image needs to be over 17 times as large to be the 'same size'.
I have no idea why the camera assigns a resolution at all. The camera
just saves the pixels, there IS no resolution yet. It could save at a
zillion dots per inch .. it would make no difference in the file.
(sorry.. got off on a rant! :redface: )