- From: Giuseppe Bilotta <giuseppe.bilotta@gmail.com>
- Date: Sat, 16 Jan 2010 11:48:26 +0100
- To: Ambrose LI <ambrose.li@gmail.com>
- Cc: "Tab Atkins Jr." <jackalmage@gmail.com>, Brad Kemper <brad.kemper@gmail.com>, "robert@ocallahan.org" <robert@ocallahan.org>, www-style <www-style@w3.org>
On Sat, Jan 16, 2010 at 10:39 AM, Ambrose LI <ambrose.li@gmail.com> wrote: > 2010/1/16 Giuseppe Bilotta <giuseppe.bilotta@gmail.com> >> >> If print vs screen is to be considered, I'd rather see it influence >> whether viewing distance should be considered or not, where print >> sizing would be unaffected by (assumed) viewing distance, in contrast >> with screens and projections, where an estimate of the viewing >> distance can be done from the device size (an information typically >> available from the o/s). For example, an iPhone with a 160dpi (=5/3 >> the CSS dpi) is usually held a 3/4 the distance of a typical monitor, >> thus leading to a 1.25 (rounded to 1) correspondence between CSS and >> actual dpi. > > But how do you estimate the viewing distance, even if only > approximate, for projections? In a large lecture hall or meeting room, > it would be a very large range, say 2–50 metres (from the first row to > the back row). Such estimates are useless. People sitting at extreme positions are going to have suboptimal viewing experiences regardless. So the question would rather be: what is the typical 'optimal' viewing distance for a projection with a 100" diagonal? -- Giuseppe "Oblomov" Bilotta
Received on Saturday, 16 January 2010 10:49:19 UTC