The gitzo systematic 100mm half bowl adapter allows a systematic series 5 tripod to be used with any 100mm diameter half ball fluid head primarily designed for video but also widely chosen to support long telephoto lenses and spotting scopes the gs5321v100 adapter is compatible with all 100mm half ball video heads and gitzos new systematic tripods in particular with the safety catch feature of gitzos updated systematic range offering secure accident proof support even during changeovers