Canon do some nice (but expensive!) tilt-shift lenses if anyone wants to play with a rental. https://www.canon.ie/lenses/ef-tilt-and-shift/ https://www.canon.i

Canon do some nice (but expensive!) tilt-shift lenses if anyone wants to play with a rental. https://www.canon.ie/lenses/ef-tilt-and-shift/ https://www.canon.ie/lenses/ef-tilt-and-shift/ In fluid mechanics we use a stroboscopic technique called Particle Image Velocimetry. The basic idea is a pulsed laser sheet illuminates a slice of a flow seeded with aerosol and we track the particles with a camera to capture the flow field. There is also stereo PIV where we exploit the scheimpflug effect to focus add axes two cameras to obtain three velocity components in a 2D slice.