Protect your scopes ocular lens with a Tactical Tough (TT) flip cap from Tenebraex.  These caps are super heavy duty unlike the usual Butler Creek units.  The TT caps also fold back almost flat to assure the least obstructed view when in use.  The caps can be rotated every few degrees and have solid detents to hold them in place. Comes with the adapter ring that either threads into your ocular lens tube or clamps over top.   Click HERE for the objective caps