Just bought a used Canon AE-1, with the silver body, i got 3 lenses with it. The one lens has this on. B&H/Canon lens, FD 24mm 1:2.8 and S.S.C in RED Capatial letters. What does S.S.C. mean, also it has another small thin lens screwed on to it. It reads, Rolev M.G. 35MM Sky in Capatial Letter, does the add on lens means it is a 35MM Lens instead of a 24MM Lens DAAAAAA?? Thanks=Mike.