5018 & 5022 Foresight iris adaptors

Our new foresight irises with a small mark between the two limits-of-adjustment (1) accept our thread adaptors
The flat face of the iris can be unscrewed (2) and an adaptor inserted (3) for use of other accessories
- 5018 for M.18 & M.17 irises to fit a lens (4), screen, anti-glare tube (5) or level (6)
- 5022 for M.22 irises