nothing scientific, but as a guess: if your sensor outresolves the lens (take a look of an out of focus pic with any lens), at large magnification, you'll see essentially blobs of uniform grey of size much larger than the size of a pixel. if your lens outresolves the sensor, at high mag. you'll see all kinds of weird things on the scales of 1..3 pixel (aliasing. moire, etc etc). of course, in real life it's a mixtureof both, since at 125 pixels/mm (60lpmm) pretty much any lens is close to its limits, but from what i see on my pic, it's more like the second case.
best, mishka On 4/6/06, John Forbes <[EMAIL PROTECTED]> wrote: > On Thu, 06 Apr 2006 05:55:59 +0100, Mishka <[EMAIL PROTECTED]> wrote: > > > K500/4.5 -- a quick shot from the balcony (kinda brick wall test, > > f11, 1/180, iso 1600) with *istdl shows that it clearly outresolves > > the 6mp sensor..... > > Congratulations. But how do you distinguish between the limits of the > lens and the limits of the sensor? I've tried to do this (rather > unscientifically) with my FA 1:2.8 100mm macro and found it very difficult > to decide whether the lens was out-resolving the sensor, or vice versa. > > John > > > > > > http://www.stat-arb.org/photos/IMGP0348.JPG > > > > now need to find an adequate tripod head... > > > > best, > > mishka > > > > > > > > > > > > > > -- > Using Opera's revolutionary e-mail client: http://www.opera.com/m2/ > >
