With all due respect falc
Quote: Must be one of the least respected advices I ever gave, given the continuation of discussion. But don't say I didn't tell you ...
I have a real problem with people who say this kind of thing... empirical evidence always trumps theoretic positions. Theory has to describe reality, not the other way around. I give no credibility whatsoever to people who put forward theoretical positions with no empirical support, and even less to those who criticize empirical studies with no empirical support. That would just be bad science. To come in here and make a statement like that and ask folks to take your word on faith, I don't know dude. That's kind of like asking for god status or something. Now I can poke holes in the methodology of the Imaging Resource until the cows come home about how good or how bad this research might be, or if it even qualifies as research... but the simple fact is, in one set of circumstances these images have shown that the APS-c can hold it's own with FF in a situation where there is no researcher bias. . Now the proper course of inquiry at this point would be to determine what those circumstances are. And that is what has always bothered me about these theoretical constructs. They are applied , especially by FF advocates very un-equally. And any data that doesn't agree with doctrine is dismissed.
But in my world, empirical results trump theoretical discussions and assumptions every time. I would offer the reverse advice. Don't listen to those who claim to have some kind of theoretical knowledge of the effects of resolution on IQ etc... look at the pictures, find the camera that takes the pictures you like and go with that. I have yet to see any empirical evidence that FF out performs APS-c at resolutions up to the native resolution of the APS-c system. I have now seen empirical evidence that 1:1 APS-c can out perform FF. What I'm working for is an understanding of the point where FF becomes necessary in terms of image acceptability, and I have to say, going through almost every FF thread on this site..all I here is crazy stupid theoretical mumbo jumbo in which FF is always necessary.
So my advice would be don't necessarily listen to DPR review, but listen to them before you listen to those who present no empirical evidence to back up the points they make. And definitely don't accept single focal plane test charts as information you can use to evaluate 3d images.
As Pentax reps have always said, "we don't build our lenses to do well on test charts, we build to capture a 3d world." I personally doubt the 2d testers have a clue what they're talking about. And I'm almost certain Pentax lens designers do. And I buy my lenses from Pentax, not people who set up tests they claim are useful for rating lenses. I have never seen a debate or any information debated on this site discussing the relevance of resolution to IQ. But I have heard lots of discussions where resolution is equated with IQ. That , from the standpoint of photography as an artistc endeavour is just a misuse of science. If you can't make your case empirically, you don't have a case.. and any real scientist will tell you that.