Definition of perspective /pəˈspektɪv/ :
An Architectural Photographer needs to have a solid understanding of how to create the illusion of 3 dimensional space in a 2 dimensional image. The use of lighting, scale, and composition can be used to create this illusion.
The thought process the photographer has toward the task of creating the image plays an important role. The results will be quite different from a photographer who has spent their life studying and immersing themselves in studying architecture compared to one who shoots primarily portraits.
Understanding the importance of the various design elements presented in the architecture is critical to creating a proper image. Knowing how to manipulate the elements in the frame to give proper importance to the design ideas is the ultimate goal of a good architectural photographer.
In some regards architectural photography seems pretty simple, building is there, the photographer picks a spot and snaps a nice one with his expensive camera. In reality, the camera is literally one of the elements of the picture making process that matters the least. It is important, but its a technical answer to just one of hundreds of more important decisions that are made on set.