Proportion questions (4/3 or 3/2)


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thumeau

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Dec 15, 2003
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#1
Hi there,
As I'm planning to print some pictures for framing and for archiving into A4 folders, I realize I may have a proportion problem...

My digital pictures are from a Nikon D70 DSLR (res. 3008x2000) which is about a 3/2 proportion.
Then, the frames I bought are 12x16 which is a 4/3 format.
Then, A4 (21x29,7) is just in between.

I would like some advise on how to resolve this issue.
Do you recommend to crop, or change the ratio by distortion or a bit of both?

Also, I would like to know what are the usual printing proportions (for 4R, 10R...)

Thank you,
Thomas.
 

jimtong

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May 8, 2002
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#2
thumeau said:
Hi there,
As I'm planning to print some pictures for framing and for archiving into A4 folders, I realize I may have a proportion problem...

My digital pictures are from a Nikon D70 DSLR (res. 3008x2000) which is about a 3/2 proportion.
Then, the frames I bought are 12x16 which is a 4/3 format.
Then, A4 (21x29,7) is just in between.

I would like some advise on how to resolve this issue.
Do you recommend to crop, or change the ratio by distortion or a bit of both?

Also, I would like to know what are the usual printing proportions (for 4R, 10R...)

Thank you,
Thomas.
In PS, use fix aspect ratio of 4:3 to crop. :nono: never use distortion as it will degrade the quality of the image.
 

stroma

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Feb 20, 2004
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#4
jimtong said:
In PS, use fix aspect ratio of 4:3 to crop. :nono: never use distortion as it will degrade the quality of the image.
Once you have your crop a little distortion, using Transform>Scale can fine-tweak your sizes whilst maintaining the Crop you wish without losing "Composition" and as such is a useful resizing tool, if used in moderation: i.e.10% is about the max you can go before images begin to start to look unnatural. In my opinion this is not a degredation of the quality of the image. :)
 

nickmak

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Apr 16, 2004
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#5
when you print or photoshop, always fix your aspect ratio to that of your camera, unless you plan to crop your pic into a perfect square... For D70, its definitely 3:2 ratio so keep it at that in your editing program... for A4 its 1:sqrt2 so if you print a 3:2 picture it will be either too big or too small to fit on teh page...

Hope this helps...
 

thumeau

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Dec 15, 2003
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#6
Hi,
Thanks to your information, I'm trying to compile an Excel table for a guide of resizing/cropping before printing... The table is not complete so feel free to complete it.
Also, as you can see, it doesn't show well here because of the text format... I don't know how to make it look good... If you have any idea of how to display a nice table here...

If you want the excel file. Just send me you email by PM, I will send it.
Thanks,
Thomas.




Format Height Width Ratio H(150dpi) W(150dpi) H(300dpi) W(300dpi)

3R 3" 5" 3:5 450 600 900 1200
4R 4" 6" 2:3 600 900 1200 1800
5R 5" 7" 5:7 750 1050 1500 2100
6R 6" 8" 3:4 900 1200 1800 2400
8R 8" 10" 4:5 1200 1500 2400 3000
S8R 8" 12" 2:3 1200 1800 2400 3600
10R 10" 12" 5:6 1500 1800 3000 3600
S10R 10" 15" 2:3 1500 2250 3000 4500

A5 14,8cm 21cm sqroot(2)
A4 21cm 29,7cm sqroot(2)
A3 29,7cm 42cm sqroot(2)
 

AMDer

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Feb 17, 2002
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#7
ermm...is that why Olympus cae out with the 4/3 format so that less post-processing will be needed? or there's anoither meaning to their 4/3?
 

Azure

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Mar 16, 2003
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#9
Zod & Thumeau, please note that 3R size is 3.5" x 5". That's 1050 x 1500 pixels.
;)

The 4:3 aspect ratio has been around for digicams since a long long time ago... I remember those old (1996 izzit???) Sony Mavicas were 640x480, later 1024x768 and so on.... they are all 4:3 ratio. Nothing to do with the Olympus 4/3 system.
 

zod

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Mar 30, 2003
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#10
Azure said:
Zod & Thumeau, please note that 3R size is 3.5" x 5". That's 1050 x 1500 pixels.
;)

hmm, i din know 3r is tt size
:think:

thx thx! :blah:
 

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