Having a bit of an equipment shoot-out in the front yard:
Which is the fairer comparison for IQ between images from a 50mm lens and a 70mm lens:
Shoot at 5 paces for the 50mm and 7 paces for the 70mm?
Shoot at 5 paces for each one and re-sample the 70mm image downward?
Shoot at 7 paces for each one and re-sample the 50mm image upward?
Would appreciate your choice with supporting reasons!