I just bought a Nikon F3HP camera and now I have to buy a lens for it. I found someone selling a 50mm f1.4 ai lens for $50 dollars. I have been told that ai lenses are worthless and I should get a 50mm f1.4D or an ai-s. So I know the ai means Auto Indexing but what is the difference between ai and ai-s and what the heck is a series E Nikkor?
Should I spend $50 on an ai lens or is that too much?