Alphalas UPD Series Ultrafast Photodetector (BNC version) (STEP + STL)

While there is some drawings available on the Alphalas website, I had to measure the rest of the dimensions myself.

Feel free to edit the .step to add more details (such as the labels on the detector, the photodiode itself, threads, screws, more detail on the BNC connector etc.), or maybe even correct anything dimensionally wrong. I really only needed the hole positions and general dimensions of the object, so any fine details would be for aesthetics.