Originally posted by Yassarian good enough lens to do the sensor justice
Behind this quote, I believe, lies the mistaken notion that, somehow, a 36MP sensor 'outresolves' or stresses anything except the newest lenses, and a 36MP sensor might somehow amplify other deficiencies in older glass.
People used to heatedly argue the same thing about 8MP digital outresolving film (and film era lenses), then about 24MP sensors causing problems for lenses designed for 10/12/16MP sensors, then when the A7R and D800 arrived they argued about 36MP digital, then they argued about 50MP digital, now people are starting to argue it over future 100MP+ digital cameras outresolving current camera lenses.
Yet somehow the optics always comes out ahead of the doomsayers. Lenses DxOMark tests get sharper and reveal more resolution every time they mount them on higher resolution cameras. Sharp lenses seem to remain sharp lenses.
IMHO, image sharpness problems with high-res sensors (eg 24MP/ 36MP/ 42MP/ 50MP etc) are usually a result of trade craft, not optical, deficiencies.