Centra 5.0 - 7.0, 5.5 - 7.5 or 6.5 - 8.5 iris

Gehmann 2.9 - 4.9, 4.0 - 6.0 or 5.5 - 7.5 iris

The M30 iris is 1.25" x 28tpi

Annulus is ~1.4mm Gehmann, ~1.8mm Centra

We no longer swap irises, please select carefully.