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Re: [OM] Question for you experts

Subject: Re: [OM] Question for you experts
From: Jez Cunningham <jez@xxxxxxxxxxxxxx>
Date: Sat, 5 May 2012 18:19:49 +0200
The ratio is always sqrt(2):1 which of course is 1.414:1
So inbetween 1.33:1 and 1.5:1 and a reasonable fit for both.


On 05/05/2012, Frank Wijsmuller <wijsmuller@xxxxxxxxx> wrote:
> Actually, because the A-x formats *double* each iteration in only one
> direction (*not* proportionally 'enlarged'!), they serve both 2x3 and 3x4
> sensors...
> ....
> A5 ~ 4x3  (210x148mm - 4:2,8)
> A4 ~ 3x2  (297x210mm - 3:2,1)
> A3 ~ 4x3  (420x297mm - 4:2,8)
> A2 ~ 3x2  (594x420mm - 3:2,1)
> ....
>
> That makes it a draw ;-)
>
> Best, Frank.
>
>
> 2012/5/5 Wayne Harridge <wayne.harridge@xxxxxxxxxxxxxxxxxxx>
>
>> 4/3 is also a good fit for A4, A3,... paper sizes.
>>
>>
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