That figures! -- Bob
> -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On > Behalf Of mike wilson > Sent: 31 December 2006 18:42 > To: Pentax-Discuss Mail List > Subject: Re: PESO - Hertzlia Marina vs K10D > > Bob W wrote: > > > Conversely I'd expect to be able to put more pixels on a > larger area, > > but there seems to be some limiting factor that prevents the > > widespread use of 24x36 (or perhaps it's just a Machiavellian > > marketing trick to make people buy new lenses). > > The limit is that the pixel sites on the sensor have a > definite depth to > them, rather like millions of bogroll tubes bundled together. Little > lenses at the top, photoreceptors at the bottom. > > This means that light rays need to strike the sensor as near to > perpendicular as possible, otherwise they just hit the sides of the > tube, not the photoreceptors. Larger sensors have pixel > sites further > away from the central axis of the lens and rays are more > likely to hit > the sensor at angles further away from perpendicular than optimal, > resulting in less light accessing the photoreceptors at the bottom. > This is more likely with wideangle lenses. It's a problem > that none of > the manufactureres seems to have entirely overcome. > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > > -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net
