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Old Apr 9, 2004, 6:24 AM   #1
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Default Aspect ratios 3:2 and 4:3. Whats the difference?

Hi

Ive seen on some digicams that they shoot in 3:2 and 4:3 ratios and some do both. Whats the differences?

Can you still print out the usall size photos e.g 6x4 5x7 8x10 etc.
On both ratios??

Thanks
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Old Apr 9, 2004, 7:53 AM   #2
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4:3 or 3:2 is the ratio of the width/height that the camera will output. For example, a 6x4 print is 6/4, divide top and bottom by 2 and you get 3:2. This means that 6x4 prints are in the 3:2 aspect ratio, therefore any camera that output 3:2 images will print perfect 6x4 prints with no cropping. If you wanted to print 5x7 or other sizes, you need to crop the picture since the other sizes are not in the same ratio.

Regardless of if you camera outputs in 3:2 or 4:3, yes you can print 4x6, 5x7, etc. You'll just have to know that when you submitt your prints for printing they will be cropped to the correct aspect ratio. So that I can choose what I'm not going to see in my print, I always crop my digital files to the ratio I plan to use. Always do this to copies though ... never edit the original file since those are your equiv. to the negative.

4:3 aspect ratio by the way is the exact ratio of your monitor. 4:3's will fill your entire display where a 3:2 will not. My Dslr does 3:2 and personally I like this as it is the same aspect ratio of 35mm film and that is what I'm used to.
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Old Apr 9, 2004, 9:51 AM   #3
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Default Re: Aspect ratios 3:2 and 4:3. Whats the difference?

Quote:
Originally Posted by The Rat
Whats the differences?
1:6 (Mathematical joke)
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Old Apr 9, 2004, 10:06 AM   #4
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and you thought that math you learned wouldn't come in handy!
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Old Apr 12, 2004, 12:13 AM   #5
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3:2 is excellent on wide screens like 15.4 inch screen.
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Old Apr 12, 2004, 12:12 PM   #6
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Default Re: Aspect ratios 3:2 and 4:3. Whats the difference?

Quote:
Originally Posted by Alan T
Quote:
Originally Posted by The Rat
Whats the differences?
1:6 (Mathematical joke)
How did you get that?
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Old Apr 16, 2004, 4:11 PM   #7
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Default Re: Aspect ratios 3:2 and 4:3. Whats the difference?

Quote:
Originally Posted by JerryF
Quote:
Originally Posted by Alan T
Quote:
Originally Posted by The Rat
Whats the differences?
1:6 (Mathematical joke)
How did you get that?
3:2 is another way of writing 3/2 = 9/6.
4:3 is another way of writing 4/3 = 8/6.

Nine sixths minus eight sixths is one sixth or 1/6 or 1:6.

That's what I meant, anyway.
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Old Apr 16, 2004, 5:19 PM   #8
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Default Re: Aspect ratios 3:2 and 4:3. Whats the difference?

Quote:
Originally Posted by Alan T
3:2 is another way of writing 3/2 = 9/6.
4:3 is another way of writing 4/3 = 8/6.

Nine sixths minus eight sixths is one sixth or 1/6 or 1:6.

That's what I meant, anyway.
Ah!

I was looking at it as:

2:3 = 2/3 (8/12)
3:4 = 3/4 (9/12)

9/12 minus 8/12 = 1/12 or 1:12

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Old Apr 16, 2004, 10:24 PM   #9
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If you make a projection of a 2:3 in a 3:4 so that the 3:4 covers the 2:3, then the area ratio is:

a23/a34 = 2*4/3 * 4 / 3*4 = 8/9

The 2:3 covers then 88.8% of the 3:4 area.

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Old Apr 21, 2004, 11:16 AM   #10
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Here is a chart that you may find useful. Although a 3:2 Aspect Ratio (ratio of width to height) is perfect for 4"x6" prints, it does not work as well as a 4:3 Aspect Ratio for larger print sizes:

http://home.earthlink.net/~terryleed....htm#frameutil

You may also want to read through this related forum thread:

http://www.stevesforums.com/phpBB2/v...c.php?p=124108

I usually shoot in 4:3 mode with my cameras, cropping as needed (depending on the desired print size).
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