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07/09/2008 08:12:31 PM · #1 |
Hey I just have a quick question. I'm sorry if its a dumb one but I've never gotten one of my pictures printed
My rebel XTI at 10mp delivers an image that is 3888x2592 pixels. What does that equate to in inches? I would like to get some prints made but I want to know how big I can go without exceeding 100% pixel size.
This is assuming 100 ISO correct exposure sharpening ect.
Thanks in advance for your help! |
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07/09/2008 08:17:42 PM · #2 |
You can exceed pixel size easily without a loss of image quality. I can print 12MP from my D300 at 20x30 if I want, granted the pictures the same conditions as you outlined.
Otherwise, it's going to be roughly 8x12". Roughly. You'll have no issues printing an 8x10 or the entire frame in an 8x12. |
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07/09/2008 08:22:30 PM · #3 |
| DPC Prints Print Sizes in Pixels -- follow these guidelines if you want to offer your print(s) for public sale through DPCP. |
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07/09/2008 08:47:01 PM · #4 |
Here's a tip for cropping an image without altering ANY pixels:
In Photoshop, take your image, choose the crop tool, find an aspect ratio or make your own by typing in the desired sizes in the tool bar on top, like 8in and 10in and 300 in the DPI. Then using the crop tool, drag your box as you want it cropped, over the image, adjusting after setting it by dragging the corners to adjust size and using the arrow keys on the keyboard (more accurate) or click inside the box and moving with your mouse. When you have it just right, make sure your rulers are showing (View, Rulers) and click in the ruler section and drag a guide to each of the 2 horizontal and vertical crop dotted lines (it will snap to them when you get right near them). That will leave you with your dotted lines and cyan (default color) guides showing, then click back on the crop tool. You will get a popup asking if you want to crop it, but select No. Go back to the top tool bar where the crop dimensions are and clear out any numbers except the 300DPI. Now go back to the image with the crop tool and drag a box using the guides - again it will snap to the guides when you get near them. If you miss and stop short of or go beyond the guides, each side will have a small box in the center of the crop dotted lines and is where you would click and drag a side until it snaps to the guide. (The sides will only move that side as opposed to a fixed aspect ratio move, which will resize proportionally) Your crop is now set to the guides, by the 8x10 aspect ratio and every pixel in that crop will be chosen when you apply or double-click inside the box. Then View, Clear Guides.
What this does is to crop at the desired aspect ratio, selecting exactly the pixels in the ratio, without altering any pixels, yielding the highest quality printable file without damaging any pixels. The actual height & width numbers will never be standard numbers, yet will be the exact aspect ration you wanted, and when printed, will yield the best results.
Message edited by author 2008-07-09 20:47:11. |
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07/09/2008 09:36:29 PM · #5 |
Brad, how is this different from choosing an aspect ratio for the marquee tool, making the selection, and choosing edit-> crop?
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07/09/2008 10:02:27 PM · #6 |
Originally posted by levyj413:
Brad, how is this different from choosing an aspect ratio for the marquee tool, making the selection, and choosing edit-> crop? |
The Crop tool is a little more flexible than the marquee -- for example, you can rotate at the same time. Personally, I have a harder time moving the marquee around than the Crop tool, but there's not that much difference otherwise. |
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07/09/2008 11:12:53 PM · #7 |
Originally posted by levyj413:
Brad, how is this different from choosing an aspect ratio for the marquee tool, making the selection, and choosing edit-> crop? |
Ha - never used the aspect ratio portion of the marquee tool. (says the old dog here learnin' new tricks)
I guess it would do the same, but as Paul said, the crop tool does give just a little more flexibility. Bottom line is the actual pixels do not get compressed or altered and the final result in either method is non-compromised pixels in the desired aspect ratio for print. |
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07/10/2008 12:39:09 AM · #8 |
Now for the *real* question: what DPI do you *really* need for large prints?
I have a 150 DPI 16x20 on my wall that looks great at normal viewing distances. From 6 inches away it doesn't look so hot, but who cares?
For the first time, I may have an opportunity to sell an image for serious money, and I'm being asked how big it'll print. Well, at 150 DPI and 20% enlargement (which I've seen many times not harm anything), it could go up to 20x30. And nicely matted and framed, that'd be an even larger wall presence. And that might be big enough.
But what about even bigger? If you're talking 4x6 FEET, no one's going to stand as close as they would peering at a 4x6 INCH print.
And I keep reading about billboards at 17 DPI or something like that.
Anybody got any guidance on that?
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07/10/2008 01:02:06 AM · #9 |
It al has to do with angular resolution and viewing distance. If you view from twice as far away, the pixels can be twice the original size (approximately). I have a 2MP image I "matted" digitally and blew up to print 20x30 -- yes, if you get within a foot or so you can see the fuzziness and digital noise, but that's not where one would normally view it from, so who cares.
At 150dpi an image should look OK up close, say 6-18 inches. if you lower the dpi to 75 you'd probably have to stand at least three feet away to get the same effect. |
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07/10/2008 01:05:50 AM · #10 |
From what printers have told me, larger prints at 200dpi is perfect and really doesn't need to be higher. dpi needs drop as the size goes up.
On a side note, this DPCPrint is available up to 30x40" (is 300dpi)
Print File Specs:
Width: 4500
Height: 6000
Size: 13.9mb
Aspect: 1.33:1 |
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07/10/2008 01:29:47 AM · #11 |
Seems it'd be 150 DPI at 30x40, Brad.
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