i need some help how do i illustrate or show distance or scale in a photograph
For Scale – One way is to include a subject other that your main subject (some known reference that the viewer is familiar with), but make sure that it is placed at the correct point in the composition to be relevant.
Example: How big is a particular lens ?
Take a shot with a match box next to the lense – they must be in the same focal plane.
You can do the same for distance, but it can only be applied in a plane 90 degrees to the camera axis.
Both can get very tricky when dealing with large objects.