Stay at home
- Aug 16, 2012
The combined resolution of the sensor and the lens is MTF = MTF(lens)*MTF(sensor). The combination of the same lens with a higher resolution sensor will always outresolve the combination of that lens with a lower resolution sensor unless the MTF of the lens is zero.Depends on the resolution of the lens. Once that limit is reached, it can't resolve more line pairs even if the resolution of the sensor gets higher. If a lens can resolve 5,000 lines or so, that is already quite a lot. If you make sure that the sensor has a lower resolution that the lens, you have a high chance of very crisp looking photos.
Even some L-lenses have a low resoultion. For example the famous 17-40 f/4. If I would put that on a higher resolution body, it might be somewhat sharper in the center, but the rest would look like an already blur photo upsampled even further. For 45 megapixels or even more, you really need very sharp and very expensive lenses.
I really like my Tamron 200-500, because it is very light and affordable, but on a 45 megapixel body the photos would look blurry. I would have to downsample all of them to make them look better. And even with the sharpest lens, hot air will spoil your image.