I have already used the search function to try and find the answer.
I have found that I need size 39 for the objective.
What do I need for the eye end, bearing in mind the buttons for the IR controls?
Has anyone actually fitted Butler Creeks to their Zeiss Duralyt 3-12 x 50 IR. Did you need to trim it down at all?
I know the quality of Butler Creeks has gone down, so also open to suggestions of alternatives.