[Brightcolours]

I have to be careful here, because I am really no expert lens tester (far from that), but it seems to me that the increase of resolution by an increase of mp AS SUCH should not result in less brilliant lens-testing results as regards sharpness/resolution.

 

However, the Imatest does apparently show that the new high mp sensors do result in less brilliant results. This would mean that the only reason why we aim at high mp counts, i.e., higher resolution and by that more detail, did not come through. So, in general, there is an optimum mp count per sensor type??????

 

OR is an increase in mp count gained at a cost in another aspect of sensor quality, resulting in blurring the theoretical gain in resolution away? That would be a very bad thing. And how does that explain the fact that the difference between the edges and the centre increases? I may hope that there is no quality gradient over the sensor. I agree, all speculation, but should we ask Sony to produce an A6000/6300 with 16 mp? Or is the Imatest fooling us? I am puzzled ....

 

I fully agree with your remarks about Sony and it approach of the APS-C NEX/A E-mount range. If they will not come with a serious gamma of lenses very they kill this system. It is no option to let APS-C pay the extra costs of full-frame lenses. I must say that if I had to start again, I would not choose the Sony APS-C E-mount system again. However, to be honest, my practical photo experience is not really suffering from these flaws.

You don't get it yet. The nex7 sensor has a flaw, be it the sensor glass, the micro lenses or both, which makes it perform badly with lenses which let light fall on the borders at certain angles. Normally, one would never see lower numbers when testing with higher resolution sensors. Especially with mirrorless with short flange distances and bigger angles of light with certain lens designs, in combination with careless sensor design, we can see problems.

 

Problem is, it depends on the lens tested whether such an issue shows up. The NEX5 and Nex7 both have issues, the Nex 5R had it resolved and the A6000  doe snot seem as affected either. 

 

If the camera designers take care designing the micro lenses and sensor stack, there is no limit to the sensor resolution (meaning, a high res. sensor will not show lower MTF figures than a lower res. sensor).

 

By the way, Sony is not the only one making such errors. Leica had a similar issue with one of the M series (forgot which one) where corners would get wrong colours. And there are a few reports that the Canon EOS M3 can show some green discolouration in corners (although so faint that many users report not seeing any issue):

http://www.cameralabs.com/reviews/Canon_EOS_M3/

 

But as badly messed up as Sony did with the nex7, that is special.