Richard G
Veteran
I have gone from 25, to 21 and now 18. It is easy to straighten a shot in post processing but not having the film plane parallel to the face of a building causes converging horizontal lines that are hard to fix. I now frame in the external viewfinder, but to take the shot I return to the camera VF and not only keep the horizontal frame line level more easily there, but also find it easier to orient the camera to have the vertical frame lines equidistant from the straight on point of the building, putting the film plane closer to parallel to the face of the building.