Tilt

 
Tilt
Street Shooting &PerspectiveControl
In my darkroom days I would occasionally need to correct for perspective when buildings were in a shot. I'm not talking about doing architectural photography, where a rising front is needed to properly correct for what appears to be a backwards tilt when looking upwards. I mean in street shooting, where the same problem can exist, but because of the style of shooting and the equipment used, in-camera correction can't be performed.
The way this was done in the darkroom would be to prop up one end of the enlarging easel until the lines were straight, stop down the enlarging lens as far as it would go to maximize depth of field, and then dodge the top of the frame continuously during the exposure to try and even-out the light since the top of the easel was now quite a bit closer to the enlarging head than was the bottom. Not much fun, and hard to do in a repeatable manner.
The digital darkroom has made this a lot easier to accomplish. T...