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DPChallenge Forums >> Hardware and Software >> How many megapixels needed for 30ft stock photo
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Showing posts 1 - 11 of 11, (reverse)
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12/10/2006 11:20:25 AM · #1
I recently saw on a stock site, that someone needed a photo which would be printed out at a length of 30feet along its longest side.
I just need to know how many megapixels would you need for such a photo, or is this size only possible with a film camera.
12/10/2006 11:23:11 AM · #2
I would think it depends on how far away it will be from the viewer.
12/10/2006 12:00:23 PM · #3
It has nothing to do with a film camera or a digital camera. Such large sized photos will probably be viewed from a long distance, and the pixels on them can be as big as golf balls. You can take a 6-8MP cam picture and make it into a huge signboard. You can use a 5MP camera to produce a 100MP photo by stitching hundreds of photos together. It all depends on what you want and how skilled you are to do it.
12/10/2006 12:14:36 PM · #4
By way of example, an 8.6 megapixel image blown up to 30 feet by 20 feet would have pixels 1/10 inch in square (10 ppi). While that sounds awful, keep in mind that these large displays are normally viewed from many feet away.
12/10/2006 12:16:49 PM · #5
Well your going to be expanding beyond what the image size is but think of it as 150 PPI and being printed at 300 DPI.... a 22MP LeafBack Camera should work hehe.

ANd as far as a film camera goes.... i wouldnt even do it with 35mm id go large format... such as the 22MP leafback cameras are large format digital, on the flipside the 35mm film in lab conditions can have a higher resolution but then again compared to large format it also can be even higher.

Message edited by author 2006-12-10 12:20:48.
12/10/2006 12:32:03 PM · #6
Originally posted by rainmotorsports:

Well your going to be expanding beyond what the image size is but think of it as 150 PPI and being printed at 300 DPI.... a 22MP LeafBack Camera should work hehe.

ANd as far as a film camera goes.... i wouldnt even do it with 35mm id go large format... such as the 22MP leafback cameras are large format digital, on the flipside the 35mm film in lab conditions can have a higher resolution but then again compared to large format it also can be even higher.


I don't think large format is really needed, 6x6 is more then enough.
12/10/2006 12:33:56 PM · #7
Someone posted here a while back that one of their shots was used as a billboard advertisement and I'm pretty sure they said they shot it with a 10D.
12/10/2006 12:37:00 PM · #8
Originally posted by Megatherian:

Someone posted here a while back that one of their shots was used as a billboard advertisement and I'm pretty sure they said they shot it with a 10D.

A 10D is more than adequate for a billboard. Now if you want photo glossy quality from 5 feet away, nope you can't do it from a single photo. Start stitching lots and lots of photos. ;)
12/10/2006 12:42:20 PM · #9
Originally posted by Megatherian:

Someone posted here a while back that one of their shots was used as a billboard advertisement and I'm pretty sure they said they shot it with a 10D.


Yes they did and it's quite adequate for the chore. The pixels (as said earlier) are huge on billboards.

What wasn't stated in the Original Post is whether the use was for a billboard. I would think a murale on a wall 30 feet in length may require a bit more resoultion.
12/10/2006 05:56:26 PM · #10
at that size i'm sure they're printing @ 11dpi so you need 3,960 pixels to fill the width..

with a 10.1megapixel camera you're looking at 3888 pixels now taking into effect you can generally get away with 130% increase in print without any interpliation i don't see this being printed without much of a problem with a 10mp camera ;)
12/10/2006 06:00:11 PM · #11
If it's a billboard, a (good) 3Mp camera is plenty.

15 dpi is typical.
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