Thanks for the link. I recognize myself and my overdependence on
theoretical calculators. But the most interesting comments there were
those relating ultimate sharpness limitations to focus and
subject/camera motion.
"Of course, in practice, any handheld camera used at an exposure of
longer than 1/1000 s isn't going to resolve more than about 6 Mpix in
any case, regardless of the lens or sensor used. Camera shake and focus
errors will absolutely wipe out any resolution above that, fancy lenses
and ultra-dense sensors notwithstanding."
Chuck Norcutt
On 8/30/2011 11:34 PM, Moose wrote:
>
> All the DOF formulae that we grew up with use the thin lens
> assumption and were based on observation of human viewings of B&W
> prints taken with film.
>
> It seems clear to me that they are no more than general guidelines
> with very complex lenses, digital sensors and digital viewing.
>
> There's a related discussion on TOP today on Ctein's topic, "Will the
> Sony NEX-7 Suffer Diffraction Effects?", with at least a couple of
> quite interesting responses.
> <http://theonlinephotographer.typepad.com/the_online_photographer/2011/08/nex-7-diffraction-effects.html>
>
> Mine, which may or may not be interesting, suggests that Ctein might
> revise his article to say "Always look at actual pictures and let
> your eyes be your guide."
>
> I conclude "The map is NEVER the territory."
>
> I have simply seen too much stuff that doesn't agree with theory to
> take theory's word for the actual territory. BTW, with 20/10 vision,
> my DOF tables would be different anyway. :-)
>
> Moose
--
_________________________________________________________________
Options: http://lists.thomasclausen.net/mailman/listinfo/olympus
Archives: http://lists.thomasclausen.net/mailman/private/olympus/
Themed Olympus Photo Exhibition: http://www.tope.nl/
|