Iris diaphragm in holder, SE

Continuously adjustable pinhole for optics experiments SE (pinhole camera, eye model, optical instruments, polarisation);
high quality pinhole aperture (D= 2.5 - 35 mm), built into optics holder SE,

can be plugged into all sliding saddles SE for mounting:
P5310-1E sliding saddle for optical bench
P5310-1H sliding saddle with set screw
P5310-3F sliding saddle for screens, springs and pointers

Optical axis: 58 mm
Dimensions: approx. 90 x 17 x 98 mm
Material: black plastic
Mass: approx. 55 g