Shop › Karlsruhe foresight Iris Image 1 of 2 Image 2 of 2 Karlsruhe foresight Iris £42.00 2.5 to 4.0 adjustable iris foresight. Ref 3201Condition: Used, good working order. Buy Now Added! 2.5 to 4.0 adjustable iris foresight. Ref 3201Condition: Used, good working order.