File: Screenshot 2026-04-02 164515.png (162.2 KB)

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I purchased two 2 in (50mm) circular lens which I need to run in series to collimate a beam of light. The problem is that they are circular (duh), and need to be secured. I was originally planning to fit them in a series of 2 in couplings but it turns out that plumbing fittings are a hair shy of 2 in. I think I will have to file them to make the couplings to get the lenses to fit but I wanted to know if there is some time of pipe out there which actually has a 2 in inner diameter before doing this.