Resolution

Focus North

macrumors newbie
Original poster
Nov 5, 2011
17
0
I have been trying to do some larger enlargements (16x20 , 20x 30), and through walgreens it is saying my images aren't high enough of a resolution for these sizes. I am shooting a d7000 (16 mpg) and the resolution numbers are higher than their lower requirements. Is there something i am missing? Thank you.
 

Edge100

macrumors 68000
May 14, 2002
1,557
10
Where am I???
I have been trying to do some larger enlargements (16x20 , 20x 30), and through walgreens it is saying my images aren't high enough of a resolution for these sizes. I am shooting a d7000 (16 mpg) and the resolution numbers are higher than their lower requirements. Is there something i am missing? Thank you.
The D7000 produces images of 4928 x 3264 pixels.

You typically want 300 pixels per inch for a good print (though that's entirely dependent on the typical viewing distances). So divide each dimension by 300:

4928/300 = 16.43
3264/300 = 10.88

Thus, the largest print you can make at 300 ppi (which is probably what Walgreens is using as its metric for 'enough resolution') is ~16x10.

In reality, you can make much larger prints than that and still maintain adequate quality at "normal" viewing distances.
 

Focus North

macrumors newbie
Original poster
Nov 5, 2011
17
0
Photo canvas, 8x10 1200x1000 pixels
Photo canvas, 11x14 1600x1300 pixels
Photo canvas, 12x12 1400x1400 pixels
Photo canvas, 16x20 2225x1825 pixels
Photo canvas, 20x24 2700x2200 pixels
Photo canvas, 20x30 2700x2200 pixels

Here are the requirements. my photo in aperture is 4250 x 2833, yet it still states that i am under resolution. are the numbers in aperture not pixels? sorry, but i am new to this. thanks so much.
 

Nicolasdec

macrumors 65816
Dec 7, 2006
1,168
0
São Paulo
I personally think that 300DPI is overkill for a canvas print. I mean 300dpi is for max quality print jobs at the highest possible ink saturation. Ive done prints at 200-180DPI that came out really good and at more than 3 feet i couldn't tell the difference between that and 300dpi.
 

srf4real

macrumors 68040
Jul 25, 2006
3,001
26
paradise beach FL
I have been trying to do some larger enlargements ... through walgreens
Here is the real problem. Walgreens is not a professional printer, it's a hack job. If they knew what they were doing like a real printing company does, you would have no difficulty printing even larger than your request. But you'll have to pony up more than $10 a print.;)

Sad thing is, Walgreens types are putting the folks who do know what they're doing out of business.
 

Alonzo84

macrumors 6502a
Dec 18, 2009
831
16
North Carolina
I'm not sure what Walgreens charges for prints but I use mpix.com. A 16x20 print is $16, a 20x30 is $25, and a 24x36 is $45. 8x10 and 11x14 prints are $2 and $7 respectively. And you can find online coupon codes for discounts. They use high quality photo paper, offer color correction for those of us who don't have the best monitors, and ship the prints flat on cardboard sheets. Places like shutterfly ship their prints rolled in tubes, which I hate. I ordered a couple 20x30 prints and some smaller ones and they came out great. There are also plenty of other online print services available that would be much better than Walgreens.
 

Focus North

macrumors newbie
Original poster
Nov 5, 2011
17
0
Thanks for the help. I found out they are actually compressing my photos so they aren't able to enlarge. Has anyone printed through apple?
 

mackmgg

macrumors 65816
Nov 2, 2007
1,416
38
Thanks for the help. I found out they are actually compressing my photos so they aren't able to enlarge. Has anyone printed through apple?
When you just drag the thumbnail out of Aperture, it exports a compressed version. I don't use Aperture anymore so I don't know where it is, but there's an option to export the full size JPEG, which should work fine.
 

mulo

macrumors 68020
Aug 22, 2010
2,267
5
Behind you
When you just drag the thumbnail out of Aperture, it exports a compressed version. I don't use Aperture anymore so I don't know where it is, but there's an option to export the full size JPEG, which should work fine.
file - export versions - actual size
 

HBOC

macrumors 68020
Oct 14, 2008
2,494
234
SLC
I have printed a 16x20 metallic print through Millers and the dpi is 150 or so. They look killer, btw and are color corrected.
 
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