Alan writes: Jim, Thanks for the authoritative URL. Its salient point for all below: QUOTE Application When this experiment was written, back in 1972, telecentric lens systems were considered somewhat "exotic". But now (2006) they are finding new applications in astronomy, machine imaging applications and industrial quality control measurements. Imaging arrays are generally small compared to the area of photographic film images, and their performance is very much improved when all light rays impinge normally (perpendicular to) the array surface. This is due to the three dimensional nature of the sensor elements, and the fact that some incorporate tiny color filters above each sensor element. The entire sensor array is smaller than the diameter of the typical film camera lens. So it is quite practical to use a system telecentric on the image side to ensure that condition of normal incidence. Now such a system is even used in digital cameras (for example the Nikon Coolpix). END QUOTE ..that is exactly what I quoted.. Most likely all digital camera systems also use non-glass optical correctives to great advantage. One would suppose that the glass and the correctives correspond in some way to make the "digital" lens unlike a standard lens. No point in being reflexively cynical about marketing trade names and claims. now while that may be a reasonable reply, my interest lies in the actual functionality of lenses - and I still don't know if the modern digital lenses do as telecentrics are supposed to do and make distant objects look bigger than close objects of the same size.. this is after all, deemed a 'fault' in telecentric lenses..
