Black enamel plastic frame 100 x 75 mm with a graph paper.
In Stock
Diameter 25 mm, mounted in plastic eye-grip frame.
Cylindrical lenses made of highly polished glass, magnifies in only one dimension. These lenses are used in transforming a point image to a line or changing the height of an image without changing its width.
Free from air bubbles, all sides polished.
In metal frame with black plastic handle.
Rectangular, clear, all sides polished.