Fully closing iris diaphragms consist of 2 semi-diaphragms staggered
at an angle of 180° in two levels. A common turning ring is positioned
between these two levels. The necessary distance between levels
amounts, depending on the kind of diaphragm, from 1 to 3 mm.
These diaphragms have a fastening thread on their outside for fixing.

Please make your choice:

--