Amateur Photographer & What Digital Camera: Help with Resolution

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nel04
newbie

Reged: 29/11/2007
Posts: 4

Help with Resolution
#580445 - 08/12/2007 09:09

Hello hope this is not to much of a silly question but i am a newbie.I have just bought the EOS400D and after watching the DVD that came with this months mag i started to look at image size of my new pic in CS2.It said on the DVD for printing you should be looking at a resolution of about 300.When i look at the resolution of my new pics they are only 72..?
When i pull pics up from a very old digital camera they all have a resolution of 300....?
Now i am very confussed and would be greatfull for any one to help clear this up........

Many thanks Neal

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john_g
Pooh-bah Hoo-ha

Reged: 09/05/2007
Posts: 3213
Loc: Surrey

Re: Help with Resolution [Re: nel04]
#580460 - 08/12/2007 09:36

It's not really a problem. Your images are, in pixel terms, whatever size your camera produces. For the 400D this is 3888x2592 (assuming you are using it at its full resolution). The two variables are:
1. How big you print your pictures.
2. How many pixels per inch you print them at.

These things are related by a very simple and fairly obvious formula:
pixels per inch = pixels / length of print in inches.

So, if you print a photo with a length of 10 inches, the pixels per inch will be 3888/10 = 388.8

If you want to print at exactly 300 pixels per inch, you must make the length of the print 3888/300 = 12.96 inches.

You can change the default assumed pixels per inch in preferences (assuming it's like Elements that I use).

--------------------
John

http://www.flickr.com/photos/john_gass

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nel04
newbie

Reged: 29/11/2007
Posts: 4

Re: Help with Resolution [Re: john_g]
#580465 - 08/12/2007 09:56

Many thanks John for the replay,
On the DVD it just made it sound that to print good quality they should be a 300 resolution and got a bit worried when mine was just 72.
Glad it does not make much difference.
Many thanks for helping a newbie in this very confusing world of digital cameras..

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PHOTOSHOP ELEMENTS 8
In part four of our guide, we look at the Full Editor mode and explain how to make the best use of the available tools

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