These objective lens protective covers were developed specifically for the discerning marksman. They can be folded up against the tube body, and engage easily in this position. The ease of rotation of the protective cover is also assured by means of some precision detents, meaning that it can always be moved into a position in which it does not obstruct the marksman when at work. Schmidt Bender Tenebraex Len Covers 56mm Complete TLC-K56