Other 12.7-mm Post and Post Holders

OptoSigma provides more 1/2-in.  post holder options than just the basics.  Here, there are modular post holders with removable bases which allow the user to remove the post-held item from the setup and then return it to the exact same location.  Also included here are adjustable-height post holders which employ a helical thread similar to what is used on a zoom lens. It provides rapid but smooth vertical translation of the post