Owning an extra quick release shoe for your Paragon HD-F2 or Paragon-Plus XHD tripod will allow you to leave a shoe attached to each of your cameras/telescopes for quick attachment to the tripod. Photographers often leave a dovetail shoe attached to each one of their cameras, so that they can very quickly switch them around and still use the same tripod. An extra quick release shoe can also be used as a replacement if you have lost your original mounting shoes.
From the Manufacturer
An extra quick-release show for your Paragon HD-F2 or Paragon-Plus XHD tripod makes it easy to switch between multiple instruments with one tripod. Useful for quickly swapping multiple telescopes, spotting scopes, cameras, binoculars, and other instruments onto a single Paragon HD-F2 or Paragon-Plus XHD field tripod. Compatible with any instrument or camera equipped with a 1/4"-20 threaded socket. An extra quick-release shoe can also be used as a replacement if you have lost your original Paragon tripod mounting shoe. Install a Quick Release Shoe on all your gear for quick and easy installation on an Orion Paragon or Paragon-Plus field tripod