21 December, 2008

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72 dpi or 300 dpi?

11:16 PM

This is a very frequently asked question (FAQ) ask by readers who interested in submitting their works to Royalty Free Stock site. "Should i save my file in 72 dpi or 300 dpi?"....

Let me start to explain with this few terms we often see:-
dpi = dots per-inch (pixel/inch) (pic 01)
MP = million pixels

pic 01

For those who're working in agency or publishing company will know, for better printing quality, they'll set their picture in 300 dpi. For web designer, they will set their picture in 72 dpi (preview quality).

Here's the minimum file requirement for:-
Shutterstock 4.0MP (new photographer)
Dreamstime 3.0MP
Fotolia at least 1600 x 2400 pixels (3.8MP)
123rf.com at least 4MP (2200 x 1700 pixels)
istockphoto at least 1200 x 1600 pixels (1.9MP)
stockexpert at least 800 x 600 pixels
(off cause the bigger, the better :)

To make our job easier, we produce a picture with 4MP (or bigger) will satisfied all the Royalty Free Stock site.

How big is a file with 4MP (million pixels)?
As long as your file's width(W) x height(H) more than 4,000,000 (4 million). Example, 2400 x 1800 = 4,320,000 (4.3MP). So, if you set your file at 300 dpi, it become 8 inch x 6 inch(pic 02). If you set it at 72 dpi, it will be 33.333 inch x 25 inch(pic 03). But the end, BOTH the files are SAME (4.3MP).

pic 02

pic 03