I just bought a 135mm Nikon lens S mount. While fiddling with lens, salesman caused a fragile baffle within lens to be dislodged. I took lens anyway with 60 day guarantee to return if not satisfied. When lens extend to focus closer than infinity, the shiny brass of the barrel is exposed. When shooting with sun behind, seems to be no problem, but shooting at scene in general direction of sun, created a dead center flare on negative. However, examination of identical lens I have for my Contax IIa found the baffle missing there also. The baffle seems to be made of a blackish thin foil that adhered to the guide for the focusing guide but adhesive failed long ago. Pics were taken without lens shade. Expect delivery of one in a week or so. So my questions are: How crucial was this baffle? What was it made of? Will lend shade solve problem of flare? If I know what can be used to replace missing baffle, store will do necessary repairs. Any help will be appreciated.