While Lower Antelope Slot Canyon is not quite as spectacular as Upper Antelope Slot Canyon, it is definitely worth visiting (photographing) - and it offeres some advantages of its own. The first major advantage is the lack of people.
Perhaps the second advantage to this slot canyon is the 4 hours of unattended exploration provided by the photographer pass. Simply drive up to the entrance to the slot canyon and ask for this pass. You will be escorted to the slot entrance and then have up to 4 hours to shoot as desired. The slower pace of shooting in this canyon was especially appreciated. And the landscape down there is incredible.