Step lens has the cuts on the inside of the lens, and is not commonly used if I am correct. If I remember correctly it is the lens used in the parilellisphere fixtures. The fresnellens has the cuts on the outside surface of the lens.
Step lens has the cuts on the inside of the lens, and is not commonly used if I am correct. If I remember correctly it is the lens used in the parilellisphere fixtures. The fresnellens has the cuts on the outside surface of the lens.