Close to were I live here in Dublin is the stunning Eircom HQ building.

For Architectural/ real estate Photography the number one rule is your lines must be straight. This is were a shift lens comes into play. When using a shift lens, all your lines are straight. Sure you can use a 16-35mm and use the vertical slider in photoshop, but this reduces the quality of the image dramatically. The image below was captured with the Laowa 15mm shift lens. In my opinion this is a great lens and is less expensive than a Canon 17 tilt shits. My only interest is the shift function of the lens & have no need for the tilt function of a Canon 17mm TS.

Below my my camera setting in getting the shot

Laowa 15mm shifted up (not fully as this degrades the image in the corners), F11, 10 second exposure & iso 500. The 10 second exposure was just perfect to get the light trails

With Architectural photography timing plays a major part in the final image. If I had been a little later in capturing the below shot, the sky would have been too dark. A little earlier and the sky would have been too bright.. So, timing has to be perfect.