Originally posted by reh321
Yes! FF advocates like to talk about Image Quality and how a FF sensor does much better than a cropped sensor because the pixel sites are larger ... but then they start to babble when you mention that a 36 mp FF sensor has pixel sites roughly the same size as a 16 mp cropped sensor does, so the new "wonderful" 50 mp cameras will work against their own arguments.
From a practical point of view this issue of quality is most visible at high iso and only slightly.
A 55MP FF would have same pixel density as a K3 (that think is as good as D600 24MP FF at low isos) but would also have the high iso performance of an FF... After all the high iso perf of D810E is very slightly better than D600, despite having the more pixels.
For the final output quality, there less difference between MF an FF than APSC and FF... And the added quality comes as much from the body than the lenses.
But The Pentax MF has slow FPS, subpar AF (much better than other MF through) and is even bigger. Users take it for the sensor, the price and because it is better than the other MF.
For landscape, the only issue I see with APSC is that the wide angle lenses are somewhat soso sharpness wise or big. But if you don't plan to print huge, any APSC can do the work quite well already and 24MP is already a lot. Don't feel like I need MF to take a great picture of a landscape...
I might see more the difference in the end on picture with at least a bit of bokeh for the rendering or picture with high iso needss.