sorry to kick a dead horse, but I wanted to chime in on the DLA. All it means is that there is an 'ideal' aperture at which things are most in focus along the focal plane. To wide, it softens because of all of the glass being used. Too narrow, it softens because of diffraction through the narrow aperture.


When you increase the pixel density, you increase the resolution in terms of detail per sensor area. If you decrease that resolution, you get a a higher possible DLA value because the sensor simply can't detect the decrease in resolution.


If you go with a larger sensor, that limit in resolution, in terms of nanometers, or whatever, that correlates to pixel count per area, is less signficant in terms of the resolution of the image (blur is 'finer', so to speak). But, if you got the same pixel density, the DLA would be the same.


So, the DLA being at a wider aperture value on one camera isn't a bad thing. It's actually a good thing, because the sensor resolution is chalenging the resolution of the lens sooner.


The other thing to remember is that we're talking about sharpness on the focal plane. By increasing the depth of field, even if you're above the DLA, you may make more of your image FAR sharper than our theoretical would suggest. Macro photography is the most extreme example, but it's REALLY obvious.