Hi all, I need help.
I recently bought a second hand tamron 18-270. I found the back element is dirty so I used ethanol to clean it. Big mistake, looks that the back element is reactive with ethanol and it's opaque now... I don't know what to do now... I don't have tamron warranty. Is that possible to find a broken lens of the same type and switch the back element?
I can't resist to find out what happening so I opened the lens. There is no liquid in the lens, I really ruined the back element. But meantime I find that this is really a small piece and easy to switch. Does anyone know that if I can find some alternative source of this back element?