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Can I change the resolution of a tutorial


S

Stacy

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Recently I've been following a lot of photo manipulation tutorials online and am really happy with the results I've been getting.
I'd quite like to print some of these off to put on my wall but have noticed that many of the tuts I've followed have sizes of around 2000 x 2000 px with a 72 px resolution.
I'm pretty sure to get a decent large print you need a resolution of 300 px so my question is when I start with one of these tuts should I change the resolution to 300 and how badly will that effect the tutorial I'm working on.

I've read up on resolution in general and to be honest I'm finding it hard to get my head around but I 'think' that if I had an image 2000 x 2000 starting with 72 and then up the res to 300 the physical size of the image would be smaller? So should I up the pixel size to?
Would the best thing to do be create the image as per the tutorial and then change the size and res and use photoshop to resample the image?

For example, the tutorial I'm about to work on is 2500px x 2800px (72px res).
This works out at 88cm x 98cm. If I change it to 300px res it comes out as 21cm x 23cm which is too small for my wall.
Is 72px really going to give that much of a shoddy print if done largely?

I'm really sorry this post is much of a ramble. I think I'm just going round in circles. :banghead:
 
Most commercial printers and print kiosks completely ignore the ppi number in the file you send them. All they care about is the number of pixels in your file, and the size in inches or centimeters that you request. Just send them the file. Do nothing to it, and you will be fine.


T
 
Another way to look at this is that 300 ppi is needed when you're closely examining a print from a few inches away, but few people look at large prints that closely. Most people will stand back a couple of feet, and at that distance, much lower resolution is entirely acceptable.

T
 
That's great. Thanks Tom.
Now I can stop worrying about it and get on with the fun stuff.

Stacy
 
BTW, if you are concerned about the resolution / viewing distance issue and want to get a really good idea of how sharp the large print will eventually look, but without spending much money to make up the full size print, just crop out an area small enough to fit on a cheap 4x6 drugstore print at the same magnification as your intended full size print, tape it up to the wall, stand back a reasonable distance, and see if it looks sharp enough for you. Around here, 4x6 drugstore prints cost about 10-20 cents each. :-)

T
 
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