TS Optics Iris diaphragm, continuously adjustable from 2 to 28 millimetres
The iris diaphragm allows continuous reduction of the field of view from 28 millimetres to 2 millimetres. The adjustment can be made from the outside via a knurled ring.
The diaphragm can be used well for testing telescopes or for reducing stray light. Especially when observing sun, moon or planets, this diaphragm can improve contrast by reducing stray light.
Delivery contents Products specifications
| Total length | 12 mm |
| Connection to telescope | M35x0,75 female thread |
| Connection to eyepiece | M35x0,75 male thread |
