Originally posted by psoo I am obsessed with "sharp" photos
You must consider your final output.
A 36 mpx file seen on a fullHD monitor, even 4k monitor, means you don't see actual sharpness but interpolation at work. So, with more mpx if you want the best sharpness, resize your file to what is your final output. This way you'll notice some difference, no matter the lense you've used.
With prints do the same: if you have more mpx, actually you can print at a different resolution (approximizing 1dot on paper=1 pixel of resolution). Consider 300 dpi the HQ for print , but , of course, you can print at higer resolutions. BUt here comes the limits of our brain/visus accuracy :there are studies in the net and in some other threads about what is the resolving power of our eyes/brain given a distance and other factors. The sum: 300 dpi is sufficient for most uses (obviusly the bigger the print, the bigger the original mpx count of the sensor).
But yes: sharpness comes from technique and knowledge of the light. Mastering those gives the best results. Some lenses are sharper than others but making a small research on the net gives the idea that many people just sqeeze out of my camera (the model I actually own) much better files than mine and/or postproduce them way better than me. That's the point.