# The lens is held in place by an internal threaded "tube" (insert better word here) that can be removed by unscrewing with a key. It's almost like a standard slotted screw head, except hollow in the middle. The key is the exact width of the hole so it'll touch the sides of the slotted, threaded tube. (This sounds incomprehensible, but if you just look inside it's obvious how it works). | # The lens is held in place by an internal threaded "tube" (insert better word here) that can be removed by unscrewing with a key. It's almost like a standard slotted screw head, except hollow in the middle. The key is the exact width of the hole so it'll touch the sides of the slotted, threaded tube. (This sounds incomprehensible, but if you just look inside it's obvious how it works). |