This is key to measure the exact distance to the objects in a shot.
Especially for tasks in visual effects like:
- reconstructing real world cameras of an image or a video via match moving techniques to check the calculation of the solver or make sure the distances are correct
- shooting panoramas or simply extend images to make sure nodal point is correct so that objects are always captured with the same size
Further scenarios:
- building a camera rig with more than one camera to make sure you can easily stitch the images
- building a camera microscope to calculate the required lens to get the desired magnification