300 dpi?

[ndrobinson]

Hi,

I'm new to digital photography, and I have a Powershot A570IS. I need to know how to set it so that my image files will be at 300 dpi, and I can't figure it out from the manual. Can someone please walk me through this?

Appreciate it!

Andy

[Andrushka]

umm... as far as i know DPI only refers to printing, and that is not something set in camera, unless you are direct printing. DPI is not directly related to megapixels - theres more to it, but im not well versed enough to repeat it here.

[sherman111]

Breifly, without getting to techy, dpi is set when saving an image to print it. A printers settings can be changed to print at different dpi, alternatively when saving an image in say abode elements you can save the file at a given print size which will change the dpi and file size. Hope that helps.

[Andrushka]

just out of curiosity why do "need" to set your DPI at 300?

[sherman111]

Some or most photo mags when submitting photos require 300dpi with a max file size of 1.5mb.

[swampler]

DPI is worthless without an image size (in inches). For example, an 8 x 10 at 300 DPI would be 2400 x 3000. A 1 x 2 at 300 DPI is 300 x 600. Both are specified at 300 DPI, but the true resolution is worlds apart.

You can set it to 300 DPI in Photoshop (make sure the box to resample is not checked) and it will change it for you. I don't know any way to change it in camera.

[Jon]

The dpi that's embedded in the file is meaningless. What the magazines mean is that you need to furnish an image that has 300 ("linear") pixels for every inch of height or width the published picture will have. So you need 300x300 pixels for a picture that's to be 1 square inch. 1200x900 for a 4x3" picture. But it doesn't matter whether the camera said 72 dpi or 300 dpi.

[ndrobinson]

Thank you, all. Yes, I want to submit some photos to a local newspaper. and I know that for printing, most publications require 300 dpi resolution. So I can set the size and resolution in whatever program I save the images in. I get it. I thought I saw some resolution settings in one of the camera menus, though, and I guess that confused me. I don't have he camera or manual in front of me at the moment, but I'll have to go back and see what I was looking at.

[Jon]

The camera resolution setting is the total number of pixels that will be captured. It'll still have the same "dpi" embedded.