At 11:24 25.06.2003, Richard F. Man wrote:
Nope, there is no technical reason why you cannot have higher pixel count
on a same sensor size! I think with the CURRENT technology, even up to 35
MP is possible (but very very very expensive)!!!
Technology can't circumvent the physics of light. You are right that there
are no technical reason why sensors couldn't have higher pixel density, but
OTOH there's no reason they should. There's no point in adding pixels if
several neighboring pixles are bound to register the same information. The
technical reason is called diffraction, basically it's the aperture of the
lens that's restricting how much information the lens can capture and how
small spots it can make on film/sensor (no, diffraction is not an edge
effect, contrary to popular belief!). The effect is also dependant on
wavelength, so unless you plan to do some UV or X-ray imaging with perfect
lenses at full opening there's no need for higher pixel densities. For
non-perfect lenses at normal apertures the limit for useful density has
already been reached, the only real improvement that can be had in total
resolution is by making larger sensors (=mega-bucks).
The bright side of this is that the DC will soon be as good as they can get
in resolution, improving only in transfer speed, dynamic range and
bell&whistles. Hopefully they'll be better investments then.
Thomas Bryhn
< This message was delivered via the Olympus Mailing List >
< For questions, mailto:owner-olympus@xxxxxxxxxxxxxxx >
< Web Page: http://Zuiko.sls.bc.ca/swright/olympuslist.html >
|