High quality fresnel lenses made in Germany.
The fresnel lenses consist of 2 parts, which are melted together on the edges.
If cut they will seperate into 2 parts, each with a thickness of 2mm. That makes the setup of sandwitch method very comfortable.
Due to its stability there is no need for any frame for the lenses.
The material can be easily cut with a metal saw or a buzz saw.

Specifications:

- dimensions: 280 x 280mm
- thickness: 4mm
- width of groove: 0.508mm
- focal length: 277 / 190 mm