Hi Ken. They are not
really attached at all. I found a rack & pinion off a overhead projector down the tip a long time ago & the lens sits on the moveable pinion & the toucam is bolted to the rack. To get focus, I simply turn the knob & the lens (held securely with 1 rubber band & a piece of elastic

) moves but the camera stays put!
I found the focal point & then made 2 different dia. dew/ stray light shields;(black cardboard) one on the camera & one on the lens.