Some where in the Raynox club thread, a member explains that the difference in either of the Raynox adapters, works for either or any lens. However, I've used both and still own he DCR-250. The 150 and a longer lens is correct, the 250 for shorter lenses. Just make sure to use a larger aperture, i.e., f8-f22 or your DOF will be thin.
And also, since no one mentioned it, I will. Look through this thread, there are many macro shots of insects, plus a few with instructions on how they were done.
https://www.pentaxforums.com/forums/26-mini-challenges-games-photo-stories/15...r-insects.html
Yes, I am tooting my own horn, so to speak, but if I don't no one else will.