Aspect ratios for prints

Joined
Mar 27, 2007
Messages
2,312
Location
Columbia, MD
When I get my photos taken with my D200 printed, there are many times when I have to crop some out of the image when getting them printed on certain size prints. I believe they call this aspect ratio.

When I've had 4x6 prints done there is usually no cropping needed, and I've read that no cropping is needed with 8x12 prints. With 5x7 prints only a little cropping is needed, but it appears that a lot of cropping is done to 8x10 prints.

Can anyone inform me which of the following print sizes don't need cropping, which would only need a little cropping, and which would need a lot of cropping?

This info would be nice to have to reference.

Thanks.

3.5x5
4x5
4x6
5x5
5x7
6x9
8x8
8x10
8x12
5x15
10x10
10x13
12x12
10x15
11x14
10x20
12x18
16x20
16x24
20x24
20x30
 
Joined
Apr 21, 2006
Messages
15,096
Location
Nashua, NH
I am not answering directly; I will let others do that. I just want to point out that for large prints, you will want to use mat board and frames. Frames get expensive if you do not want standard sizes. I print 11 by 15 just so I can have a 2.5 inch boarder all around and still use a standard size 16 by 20 frame.
 

Commodorefirst

Admin/Moderator
Administrator
Joined
May 1, 2005
Messages
20,713
Location
Missouri
2:3 ratio is about the standard image size from D200

So this means 4x6, 6x9, 8x12, 10x15, 12x18, 16x24, 20x30 for example. Of course most inexpensive frames with presized mattes don't fit these ratios although it is getting better and better with the digital age.

to get "standard" sizes of 5x7 or 8x10 or 11x14 you will need to crop to this aspect ratio.

ratios of 2:1 is 10x20 or 5x10, just division/ratios, that is all it is.

cheers,

Wade
 
Joined
May 5, 2005
Messages
20,742
Location
SW Virginia
A full-size D200 image is 3872 x 2592 pixels. That gives an aspect ratio of 2592/3872 = 0.66942... If your print doesn't fit this aspect ratio, it will need cropping.

For example, an 8 x 12 has an aspect ratio of 8/12 = 0.66666..., so some minor cropping is required. You can do this sort of calculation for all of your other sizes - I suggest using a spreadsheet.
 
Joined
Jan 17, 2006
Messages
1,883
Location
Boaz, Alabama
I use to put a little mark on my mirror so I would know where the crop position would be for a standard size print. I don't really have to anymore but it worked like a charm.
 
J

jaymc

Guest
You can create crop presets, for specific aspect ratios, in most software.

In Photoshop CS2 - select the crop tool, click the Tool Preset picker, click the Create new tool preset, and enter the size you need.

In Capture NX - double-click the crop tool, ensure Fixed Aspect Ratio is selected and then select as needed or create a new one.

- Jay :smile:
 
J

jaymc

Guest
After entering each in NXs crop tool, I found the following results:

Amount of cropping needed -
3.5x5 - a little
4x5 - a lot
4x6 - very little
5x5 - a whole bunch
5x7 - a little
6x9 - very little
8x8 - a whole bunch
8x10 - a lot
8x12 - very little
5x15 - a whole lot (about half in fact)
10x10 - a whole bunch
10x13 - a lot
12x12 - a whole bunch
10x15 - very little
11x14 - a lot
10x20 - a whole bunch
12x18 - very little
16x20 - a lot
16x24 - very little
20x24 - a lot
20x30 - very little

- Jay :smile:
 
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