While surfing today (hey, it’s raining out, why not!), I came across an excellent article from last year by Lightroom guru Jeff Schewe that sheds an incredible amount of light and detail on print resolution. If you are printing your own prints using Lightroom then I strongly suggest you read this article and adjust your printing routine accordingly.
I’ll warn you, the article is 5 pages long and full of detail that just might cause some head-scratching, but persevere and you will come out the other end much more knowledgeable about printing.
Here is the link from the magazine Digital Photo Pro :