Date   : Wed, 14 Feb 2001 09:40:24 +0100
From   : "Mark de Weger" <mark@...>
Subject: Re: Aspect ratio of BBC screen?

> "Mark de Weger" <mark@...> wrote:
> > Can anyone tell me what the aspect ratio of actual BBC screens is? (I
> > don't have a BBC at hand to test.) I thought I inferred from old Acorn
> > documentation it's 1.25. However, in the emulators (BeebEm at least)
> > it's 1.33. And then I read somewhere it varies according to the screen
> > mode. Help!

After the different answers I got, I did some measurements myself.

First, I measured a number of screen shots from magazines. The average
aspect ratio was 1.24 (with quite a standard deviation--aspect ratios
varying from 1.13 to 1.35, probably due to different monitor settings).

Then I did some measurements using Beebem, trying to get a perfect circle.
According to my calculations (based on slightly imprecise measurements), the
aspect ratio should be 1.253.

So it seems quite likely the actual aspect ratio is 1.25.

Mark.