PHOTOGRAPHY

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I’m frequently asked how big of a print a photographer can make given
 their camera’s 24, 16, 12, 18, 8 or whatever megapixel count they have 
on their camera.  I understand why it’s a confusing question, but the 
truth is that my answer is almost always “Go for it!  It’ll look just 
fine printed that big.” 
When it comes right down to it, most cameras manufactured in 
the last few years (really anything 16 megapixels and up) are capable of
 printing billboard-size prints.  However, if you want the ultimate in 
print quality perfection, then there are limits to how big you can print
 before you start to lose a small amount of print quality. 
<h3>
Why Most Cameras Can Print HUGE Even if They Have a Lower Megapixel Count  </h3>
A very common resolution for printing an ad on a very large outdoor 
billboard is 1800 pixels on the long edge and 1200 pixels in height 
(about 15 dpi).  That equates to a mere 2.1 megapixels.  Sound crazy? 
 Well, it’s actually not.  And understanding this principle will help 
you to be able to print at much larger sizes than you think you probably
 can. 
<a href="http://ny-image3.etsy.com/il_570xN.225794231.jpg" imageanchor="1" style="clear: right; float: right; margin-bottom: 1em; margin-left: 1em;"><img border="0" height="228" src="http://ny-image3.etsy.com/il_570xN.225794231.jpg" width="320" /></a>The secret is that as print size increases, so to does viewing distance!
  If you were to stand right up in front of a billboard, you’d clearly 
see that the resolution is AWEFUL and the print looks pixelated.  But 
nobody stands with their nose to a billboard.  We see them from far 
away. 
The same thing happens on a smaller scale with prints.  When you 
print an 8×10″ print, it’s likely that someone will hold it an arm’s 
length away from their face.  So we need a resolution that will be as 
fine as our eyes can resolve (and the printer can pull off) at that 
distance.  But when you print very large (like a 24×36″ print), no one 
would stand that close to it.  Since the viewing distance is further, 
the print resolution does not need to be as fine. 
So the first question you have to ask yourself when determining how large you can print is, “What will the viewing distance be?”
  But don’t worry, we don’t need any complicated math and you don’t need
 to measure anything.  Just realize that bigger prints mean longer 
viewing distance, and that’s why I said in the opening sentence that 
almost all modern cameras can produce a good quality print of any size. 
<h3>
What DPI Produces “Perfect” Print Quality? (Green Check Marks)</h3>
In the chart on this page, where I mark “Perfect” as the print 
quality, I mean 300dpi.  That isn’t to say that some printers can’t 
print at a higher resolution than 300 dpi, but that the difference 
becomes scientific after 300 dpi.  It takes an impressive eye to be able
 to tell the difference in a print between 300 and 400 dpi–and probably a
 loupe would be necessary. 
The gold standard in printing is usually regarded as 300 dpi.   
But that’s completely different in printing compared to viewing an 
image on screen.  When you’re saving a picture in Photoshop and it asks 
you the resolution, that box is COMPLETELY irrelevant if you’ll be 
showing the image on a screen (internet, Facebook, email, etc).  You 
could put 1 in that box or 2,000 in that box and it won’t make a lick of
 difference. <a href="http://improvephotography.com/ppi-test/" target="_blank">http://improvephotography.com/ppi-test/</a> 
 Why?  Because the screen’s resolution sets the resolution!  Put 
whatever number you want in that box and you’ll see the file size stays 
exactly the same.  All that matters when you’re putting an image on a 
screen or sharing it on the web is the overall pixels wide and high. 
In the chart, I show you how big you can enlarge your print to get 
perfect, 300dpi print quality.  300dpi print resolutions are marked with
 green check marks in the chart. 
However, remember what I mentioned previously, that this really only 
matters when you’re inspecting the print under a magnifying glass.  In 
reality, as the photo gets larger, the viewing distance scoots back. 
 But if you want the ULTIMATE print quality, this is a handy guide. 
But remember that the difference between a green and a yellow 
checkmark on the chart above is mostly scientific.  More on that below. 
<h3>
For Very Good Print Quality, Follow the Yellow Check Marks for Resolution</h3>
On the guide at the top of the page, I marked with a yellow check 
mark all of the print sizes that I’d feel completely confident in 
printing.  I’ve printed at all of these resolutions with cameras at most
 of these resolutions. 
You’ll be surprised at the quality and detail you’ll see in a “yellow
 check mark” print.  In fact, the difference between the yellow and 
green check mark sizes is so tiny that most photographers couldn’t dream
 of telling the difference with a naked eye at the proper viewing 
distance (without putting your nose up to the print and squinting 
through a magnifying glass, for example). 
<h3>
5 Tricks to Help You Print Big Even If You Don’t Have Enough Megapixels</h3>
Sometimes you want to print big, but you may not have a camera with 
enough megapixels.  In those instances, here are some handy tips that 
have helped me to print HUGE prints even on lower resolution cameras. 
<ul>
<li>Shoot a panorama – When you shoot a panorama, you 
take multiple pictures and combine them together to produce a wider or 
taller image.  Since you’re combining resolution, you have a HUGE 
resulting file.  I use this frequently when shooting landscapes on my 16
 megapixel Fuji XT1.</li>
<li>If your camera has a high megapixel mode, use it! – You
 may be lucky enough to shoot a camera that has a high megapixel mode. 
 For example, some of the Olympus Micro 4/3 cameras usually shoot 16 
megapixels, but can use sensor shift to make a true 40mp file.  There 
are limitations in using something like this when there is motion in the
 scene, but it produces a fantastic file.</li>
<li>Use higher-end programs to resize before uploading to the printer
 – Whatever you do, don’t just upload a low resolution file to the 
printer.  Some printers handle this well, and others do not.  Take the 
time to up-res your lower resolution file in Photoshop and send that to 
the printer.  By doing the up-res yourself, you can add in some of the 
clarity and contrast that is usually lost when enlarging a photo.</li>
<li>Add a texture to the photo – If it works with the 
artistic goal you have in mind for the picture, you may consider adding a
 texture to the photo.  That masks a lot of the loss of resolution and 
can be a creative effect.  A matte finish can do the same thing.</li>
<li>Print on metal, canvas, or matte paper.  Avoid glossy paper.
 – Glossy paper is the most likely to show the lower resolution 
affecting the print.  If you print on metal, you can EASILY get away 
with a very resolution picture, because the inks smear on the metal. 
 Canvas and matte paper are just very slightly better for low resolution
 when compared to glossy, because the inks bleed just a tiny bit.</li>
</ul>
<h3>
Conclusion, and an Important Printing Resource!</h3>
Much more important than the number of megapixels in your camera is the quality of the printer you choose to do your printing. 
About a year ago I ordered the exact same 3 prints from about 12 
different printing companies to compare the prints and to see which 
company produced the highest quality and least expensive print.  I was shocked
 to find that the cheapest lab produced the best print, and one of the 
most expensive labs produced the worst print.  There’s actually a HUGE 
difference between the labs in terms of print quality. 
 
 
source : <a href="http://improvephotography.com/34880/how-big-print-with-megapixel-camera/">http://improvephotography.com/34880/how-big-print-with-megapixel-camera/</a> 
 
 
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How Big Can You Print with Your Camera’s Megapixels?

I’m frequently asked how big of a print a photographer can make given their camera’s 24, 16, 12, 18, 8 or whatever megapixel count they ...

How Big Can You Print with Your Camera’s Megapixels?

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