Which lantern produces a soft edge to the beam of light?

The correct choice is Fresnel, as this type of lantern is specifically designed to create a soft edge to the beam of light. The Fresnel lens allows for a diffusion of light, which helps to reduce harsh shadows and produces a more gradual transition between light and dark areas. This quality is particularly useful in theatrical lighting where a softer, more blended lighting effect is often desired to enhance mood and maintain a natural appearance on stage.

Profile spots tend to produce a more defined and sharper beam of light, making them suitable for lighting specific areas or creating strong visual effects. Follow spots are designed for tracking performers and typically feature a more concentrated beam to highlight movements, emphasizing stark contrasts rather than softness. Flood lanterns, while capable of producing wide coverage, generally illuminate large areas without the nuanced control offered by a Fresnel, resulting in a flatter wash of light. Therefore, the unique characteristics of the Fresnel make it the optimal choice for achieving a soft edge in lighting design.